12 best hot water heaters

Hot water heaters are essential appliances in most homes, providing heated water for various domestic purposes such as bathing, cleaning, and cooking. There are several types of water heaters, including tankless (on-demand) water heaters and tank-type water heaters.

1. Tank-Type Water Heaters:

  • Storage Tank: Traditional water heaters consist of a large insulated storage tank where water is heated and stored until needed.
  • Heating Elements: Electric tank-type heaters have heating elements that heat the water, whereas gas-powered heaters use a burner and chimney system.
  • Temperature and Pressure Relief Valve (TPR Valve): This safety device prevents excessive pressure and temperature buildup in the tank.
  • Anode Rod: Protects the tank from corrosion by attracting corrosive elements in the water.
  • Dip Tube: Directs cold water to the bottom of the tank for heating.

2.Tankless (On-Demand) Water Heaters:

  • No Storage Tank: Tankless heaters heat water directly as it flows through the unit, providing hot water on demand.
  • Energy Efficiency: They are energy-efficient as they only heat water when needed, avoiding standby heat loss.

3. Water Heater Parts:

  • Thermostat: Regulates the water temperature in the tank.
  • Sacrificial Anode Rod: Prevents corrosion of the tank by corroding itself in place of the tank.
  • Heating Elements/Burner: Heats the water in tank-type heaters.
  • Pressure Relief Valve: Releases excess pressure to prevent tank damage.
  • Sediment Buildup: Regular maintenance is necessary to flush out sediment that can affect efficiency.

4. Rough Plumbing:

  • Pipes and Fittings: Proper pipes and fittings are crucial for efficient water flow to and from the heater.
  • Shut-Off Valves: Essential for maintenance and repairs.
  • Ventilation (for Gas Heaters): Proper venting is necessary to remove exhaust gases safely.

5. Tools for Installation and Repair:

  • Pipe Wrench: Used for tightening and loosening pipes and fittings.
  • Adjustable Wrench: For various plumbing connections.
  • Pipe Thread Sealant: Seals pipe threads to prevent leaks.
  • Plumber's Tape: Wraps around pipe threads to create a tight seal.
  • Tubing Cutter: Cuts copper and plastic tubing cleanly and precisely.

Proper installation, maintenance, and occasional repairs are essential to ensure the efficient and safe operation of hot water heaters. It's important to follow manufacturer instructions and local plumbing codes when installing or repairing water heaters to ensure safety and compliance.

Below you can find our editor's choice of the best hot water heaters on the market
  

Bosch Electric Mini-Tank Water Heater Tronic 3000 T 4-Gallon (ES4) - Eliminate Time for Hot Water - Shelf, Wall or Floor Mounted

Bosch Thermotechnology

Based on 4 reviews Check latest price

Product description

Get hot water where it's needed, when it's needed with the Bosch ES4 Tronic 3000 T Electric water heater. This 4-gallon capacity point-of-use mini-tank fits right under your sink and provides a practical and effective solution to your hot water needs. This smaller model can be plugged right into a 120-volt outlet with the 36-37" cord, or can be installed in-line with a larger hot water source to provide "on-demand" use. The glass-lined tank offers great insulation and added durability, while the heater's fast recovery rate eliminates long waits for hot water. An external dial allows you to easily control the temperature range, and the temperature-and-pressure relief valve enhances your safety. The ES4 Tronic 3000 T from Bosch has a sleek and attractive exterior design that blends in seamlessly with existing decor when installed in a visible location, making this heater a great option in any room. Water Heater measures 13.75" H x 13.75" L x 13.5" D and weighs 17.3 lbs. Do not operate this water heater if it is has a damaged cord or plug, if it is not working properly, or if it has been damaged or dropped

Manufacturer Contact Information

800-283-3787

  • CONVENIENT HOT WATER HEATER: 4 gallon point-of-use mini-tank fits under your sink to provide hot water right where you need it. Thermal efficiency is 98%. Dimensions : 13.75 W x 13.75 H x 13.5 D Inches
  • LONG LASTING QUALITY: This electric water heater is easy to maintain and has premium glass-lined material for a long service life. (Amps 12A, Volts (VAC) 120)
  • INDEPENDENT INSTALLATION: 36-37" cord plugs into a 120 volt outlet for independent installation or in-line with a large hot water source
  • FAST RECOVERY RATE: Eliminates long waits for hot water at your sink, get on demand hot water at your every need (supplies up to 2 sinks at a time)
  • EASILY MOUNTED: Can be shelf, wall or floor mounted (bracket included); simply tap into the cold water line and install the water heater directly at the sink to provide hot water

User questions & answers

Question: Is it necessary to connect an expansion tank to this heater (for safety purposes)? It states something to that effect in the user manual
Answer: Yes, that is correct! Look for 1/2 to 3/4" hoses here on Amazon, or whatever you connection size is. They are very cheap and convenient here.
Question: would this be able to supply a shower
Answer: Installed at the outlet of the water heater, mainly to prevent electric shock, which is the second layer of protection
Question: Can be used "in-line with a large hot water source"? Would it help a large bathtub that runs out of hot water before it gets full from main tank
Answer: Should it be a white line? It means it has been powered on and can work after waiting for your settings
Question: When this heater is connected to the hot water line, what happens with the cold water that was sitting in the pipes
Answer: Dear Customer,  Thanks for your inquiry,BISELONG this water heater is not equipped with a remote control, you only need to adjust the temperature you want, generally do not need to adjust again.If you get any other question, please feel free contact us at [email protected] any time, we will do best to serve and help. Wish you pleasant shopping. Fly form BISELONG

Product features

Bosch ThermoTechnology

The Bosch Tronic 3000 T point-of-use electric mini-tanks are available in three compact sizes, which can be wall-hung (bracket included) or floor-mounted. They fit easily under a sink, even in a cabinet space, and because they have a sleek and attractive design, they blend in seamlessly with existing decor when installed in a visible location. Simply tap into the cold water line and install the water heater directly at the sink to provide hot water. Great for a wide range of locations!

Water Where You Need It

Provides hot water quickly at point of use and comes with temperature /pressure relief valve installed - 2.5 and 4 gallon tanks feature a simple 120 VAc plug-in connection (1440 watts).

Quality for Long-Life

Thick CFC-free foam insulation for maximum energy efficiency, glass-lined tank for durability.

Great for Small Spaces

Water heaters are compact and lightweight and can be floor, shelf, or wall mounted (except 7 Gallon) - features a sleek and attractive design to blend seamlessly with decor.

Minimize Wait Time for Hot Water

Waiting for hot water at a sink located far from a primary heating source can be frustrating. Only having access to cold water from a sink is just not useful, and plumbing a hot water line to every sink in a home or business requires time and money. To get hot water where it’s needed, when it’s needed, a better solution is to use the Tronic 3000 T from Bosch: a point-of-use electric mini-tank heater. This heater can supplement a primary water heating source, or be used under a single sink. In fact, the Bosch Tronic 3000 T can be used for three different applications: as a sole water heating source for a single sink, as a supplement to an existing heater located far from the sink, and as a buffer installed in-line with tankless water heaters that experience intermittent cold water, also known as 'cold water sandwiching'. No matter the configuration, there’s minimal stand-by loss from this premium mini-tank water heater.

EcoSmart ECO 11 Electric Tankless Water Heater, 13KW at 240 Volts with Patented Self Modulating Technology

EcoSmart

Based on 2 reviews Check latest price

Product description

This Smart Technology electric tankless water heater is configured as a "whole home" model for climates where incoming water temperature is 67°F and above. This model is well suited for heating up to 2-Gallon per minute, which is the equivalent of one shower head (with a 1.5 gpm flow) and one sink with a low inlet water temperature of 67°F and an output setting of 105°F. Digital Temperature Control allows you to set your temperature in increments of 1 Degree. This model can also be used in colder climates as a Point of Use for a sink or other low flow application. All tankless water heaters are sized based on flow rate and temperature rise, and there is a direct relationship between the two. So if used in a cold area requiring a high temperature rise, it will be more limited in the amount of fixtures (gallons per minute) it can heat at one time compared to a warmer climate. When sized properly this water heater will provide endless hot water and only consume the energy needed, giving the user complete control. Prior to purchase and installation please verify this model is the right size for the expected demand and electrical requirements. The ECO 11 requires a minimum 125 amp electrical panel for installation with 60 amp double pole breaker connected to set of #6 awg wire. Plumbing connections are 1/2" compression fitting with the option of 1/2" NPT adapter included. For additional assistance please feel free to contact our support center at 877-474-6473.



NOTE : 11Kw at 220 is equal to 13kw at 240. .Activation Flow : 0.3 GPM

From the Manufacturer

This Smart Technology electric tankless water heater is configured for climates where incoming water temperature is 67 Degree F and above. This model is well suited for heating up to 2-Gallon per minute, which is the equivalent of one shower head (with a 1.5 gpm flow) and one sink with a low inlet water temperature of 67 Degree F. Digital Temperature Control allows you to set your temperature in increments of 1 Degree. This model can also be used in colder climates as a Point of Use for a sink or other low flow application. Prior to purchase and installation please verify this model is the rights size for your hot water needs and electrical requirements.

  • Lifetime warranty
  • Save up to 60-percent on your water heating cost with an ECOSMART electric tankless water heater
  • Never run out of hot water with an ECOSMART tankless water heater
  • Patented Self Modulating Technology and design
  • ECOSMART tankless water heaters are 99.8-percent energy efficient.Uniform Energy Factor:0.98

User questions & answers

Question: Ours has only been in service for less than a year - will not adjust temperature to anything above 85 Deg. F. What do you think is the problem ? kds
Answer: My only guess is that the rheostat (variable resistor) that the temperature adjustment knob is attached to may be faulty. If that isn't it then I don't know. Sorry.
Question: The warrenty says that this unit must be installed by a licensed electrician and plumber, for them to honor the "life time warrenty." why
Answer: Hello Bob, The reason is the same as why an innumerable number of gadgets around the world have that little "warranty void if removed" label. Because getting inside of one requires a certain level of training and expertise. Same with this unit. GadgetsGo is an authorized Ecosmart dealer. Kind regards,HenryGadgetsGo
Question: My house is wired 110V. What additional items do I need to purchase for the conversion
Answer: Just to expand slightly on prior answers, normally a residential service feed is 240 volts between the two incoming hot legs. There is also a neutral leg, which (hopefully) has zero potential with reference to ground. The voltage between either one of the hot legs and the neutral leg is 120 volts. The 120 volt circuits in your house are connected to one or the other of the two hot legs, and only one. An attempt is made to assign circuits to the two hot legs in a way that will roughly balance the load between them. The other side of a 120 volt circuit is connected to the neutral leg. There is additionally a safety ground run with the circuit, which also ties into the panel. Certain devices require more power (work product of current and voltage) than is practical to deliver using a 120 volt circuit. Common examples are your clothes dryer, and your electric stove. These devices are powered by both hot legs, with a difference in potential of 240 volts. This water heater is also such a device.STRONG BUT FRIENDLY WARNING: If you did not already know this, please don't make wiring this water heater your learning opportunity with electricity. Hire someone who knows how to do it right. Cutting corners, especially with higher currents and voltages, can lead to equipment damage, fire, and electrocution. Electricity is not magic, and you can certainly learn how to do many common wiring tasks safely on your own, but today is not the day to begin that journey. You need properly sized components, properly installed, and connected to an adequate service. Also, if you really, really foul up, you could conceivably wind up making that morning shower more energizing than you ever imagined, if you get what I mean. So newly aspiring electricians should go fix their grandmother's favorite table lamp instead. Once they have that working they can use it to to start reading books about electricity, residential wiring, and eventually, books about this stuff: http://amazon.com/s/ref=nb_sb_ss_c_0_8?url=search-alias%3Dstripbooks&field-keywords=nec+code&sprefix=nec+code%2Caps%2C164 . Of course, you still have to know not to nick conductors when you strip them, and other trade craft like that ; ) . Like almost everything in life that is fun, electricity will hurt you. Sort of like all those people you dated for a while, and then wished later you had never met.
Question: what amp breaker is required
Answer: The National Electrical Code requires conductors and overcurrent protection to be sized at 100% of the manufacturer's branch circuit recommendation for tankless electric water heaters. A 60 amp breaker is the same price as a 40 or 50, it is the wire that costs more. #6 AWG wire is required for a 60 amp circuit. If you undersize the wire it could overheat and catch fire. Protect your family and follow the manufacturer's sizing for this, or any other, electrical device. Your family's lives are worth the extra money. 

Product features

3 Smart Steps for Endless Hot Water

Step 1: Determining your average inlet water temperature is important, this allows you to determine how well your unit will perform in your desired location. A lower inlet water temperature will require a higher kilowatt product.

Step 2: Next you will determine how many applications your unit can run simultaneously at your chosen location inlet water temperature. Tankless electric water heaters are sized for maximum simultaneous use, not maximum fixtures in your home.

Step 3: Determining specifications and electrical infrastructure is important because without the correct infrastructure your unit may not fit into your breaker panel.

Bosch Electric Mini-Tank Water Heater Tronic 3000 T 7-Gallon (ES8) - Eliminate Time for Hot Water - Shelf, Wall or Floor Mounted

Bosch Thermotechnology

Based on 733 reviews Check latest price

Product description

120V - requires hard wiring. 1440W element. Magnesium anode rod. Rectangular shape with 2" of foam insulation. Glass lined tank for longer life. 6 year on heater and 1 year on parts for both commercial and residential use. Temperature/pressure relief valve included. Can be mounted both horizontally or vertically. Mounts on floor or wall. Meets ASHRAE 90. 1. See Info Page for technical and installation specifications.

Manufacturer Contact Information

800-283-3787

  • CONVENIENT HOT WATER HEATER: 7 gallon point-of-use mini-tank fits under your sink to provide hot water right where you need it. Thermal efficiency is 98%. Dimensions : 17.5 W x 17.5 H x 14.5 D Inches
  • INSTALLED VERTICALLY OR HORIZONTALLY: This larger model can be mounted vertically (7 gal. of water supply) or horizontally (5.1 gal. of water supply)- vertical orientation is installed with the cold and hot lines on top of the unit
  • RELIABLE WATER SOURCE: Easily hard-wire the 7-gallon model to provide the on-demand reliable water source your home or office needs
  • IMPORTANT INFORMATION: Heating capacity of 1440 watts and a temperature range of 65-145°F max. Operating pressure-150 psi. Water fittings-3/4 inch Male NPT. Electrical requirements (Amp 12A/Volts 120)
  • EASILY MOUNTED: Can be shelf, wall or floor mounted (bracket included for vertical orientation only); simply tap into the cold water line and install the water heater directly at the sink to provide hot water

User questions & answers

Question: What is the recovery time if the 7 gallons of hot water is used
Answer: I have the 4 gallon tank and it is not too bad for the reheat
Question: Can I reduce the pipe's size from 3/4 in to 1/2 in without any negative effect on the unit
Answer: No harm to unit.....Max water flow will be reduced a little.
Question: Can i use this to replace a small rv hot water heater
Answer: Yes, but realize that it's electric and draws quite a few amps, most rv water heaters are propane.
Question: The Manual request for the ES8 a 20 Amp breaker and 12GA wire. The wattage however is 1440 with 12 Amps. Why then 20 Amp breaker and not
Answer: I would use a 20 amp circuit with 12 ga wire but there are no inrush concerns with a resistive load. A heating element does not have a higher initial current draw like a motor. It draws 1440 watts or 12 amps at 120v. Since 14 ga wire must be fused for 15 amps, this device by itself is already at 80% of the circuit’s capacity.

Product features

Bosch ThermoTechnology

The Bosch Tronic 3000 T point-of-use electric mini-tanks are available in three compact sizes, which can be wall-hung (bracket included) or floor-mounted. They fit easily under a sink, even in a cabinet space, and because they have a sleek and attractive design, they blend in seamlessly with existing decor when installed in a visible location. Simply tap into the cold water line and install the water heater directly at the sink to provide hot water. Great for a wide range of locations!

Water Where You Need It

Provides hot water quickly at point of use and comes with temperature /pressure relief valve installed - 2.5 and 4 gallon tanks feature a simple 120 VAc plug-in connection (1440 watts).

Quality for Long-Life

Thick CFC-free foam insulation for maximum energy efficiency, glass-lined tank for durability.

Great for Small Spaces

Water heaters are compact and lightweight and can be floor, shelf, or wall mounted (except 7 Gallon) - features a sleek and attractive design to blend seamlessly with decor.

Minimize Wait Time for Hot Water

Waiting for hot water at a sink located far from a primary heating source can be frustrating. Only having access to cold water from a sink is just not useful, and plumbing a hot water line to every sink in a home or business requires time and money. To get hot water where it’s needed, when it’s needed, a better solution is to use the Tronic 3000 T from Bosch: a point-of-use electric mini-tank heater. This heater can supplement a primary water heating source, or be used under a single sink. In fact, the Bosch Tronic 3000 T can be used for three different applications: as a sole water heating source for a single sink, as a supplement to an existing heater located far from the sink, and as a buffer installed in-line with tankless water heaters that experience intermittent cold water, also known as 'cold water sandwiching'. No matter the configuration, there’s minimal stand-by loss from this premium mini-tank water heater.

3M Aqua-Pure Whole House Scale Inhibition Inline Water System AP430SS, Helps Prevent Scale Build Up On Hot Water Heaters and Boilers

3M Aqua-Pure

Based on 2 reviews Check latest price

Product description

The 3M Aqua-Pure Whole House Scale Inhibition Inline Water System AP430SS is designed to help reduce scale build-up and corrosion - thereby helping to extend the life on hot water-using appliances such as water heaters (standard (gas or electric) and tank-less), boilers, clothes washers and dishwashing machines, and on plumbing fixtures like faucets, pipes, and shower heads. The AP430SS provides a flow of up to 10 GPM with ¾” NPT inlet/outlet connections. Scale is calcium and magnesium deposits that often form when hard water is heated. Water hardness is responsible for most scale formation in pipes, water heaters, finishes and flat surfaces, and other water using appliances. Over time scale build-up can significantly shorten the life of any water-using appliance. Also scale buildup inside pipes causes loss of water pressure as the interior gets smaller and smaller over time. The AP430SS contains polyphosphates to bind calcium and magnesium hardness minerals, helping to prevent them from precipitating out (or becoming a solid) and building up on metallic surfaces. Polyphosphates also helps prevent corrosion by forming a thin protective layer on the metal surface. The 3M Scale Inhibition Water System AP430SS is tested by NSF International to NSF/ANSI Std. 42 for material and structural requirements only. The overall single vessel/cartridge design of the AP430SS makes the 3M Aqua-Pure AP431 Water Filter Cartridge change-out easy for professionals as well as end users. Change disposable filter cartridge every 6 months or sooner if you observe noticeable reduction in water flow rate. The AP430SS is to be installed on the cold water supply line of the water heater or at point-of-entry of water into the home. Tools and parts required (not included): one ¾” stop and waste valve (compression type), PTFE tape, two ¾” male x ¾” street adapters, one ¾” compression gate valve, and pipe cutter. Read all instructions carefully before attempting to start installation. The existing shut-off valve remains in place and still acts as the cold water shut-off. This filter system has 3/4” connections. The AP430SS can be adapted to various pipe sizes by using reducing adapter on either end. Installation fittings can be sweated or threaded. Use galvanized fittings for installation of galvanized pipe. Aquapure by Cuno hot water system protector to reduce scale build up in pipes and extend life of water heater. Installs on cold water side of hot water system to inhibit scaling and corrosion.

From the Manufacturer

Aquapure by Cuno hot water system protector to reduce scale build up in pipes and extend life of water heater. Installs on cold water side of hot water system to inhibit scaling and corrosion.

  • HELPS PROTECT HOT WATER HEATERS: Polyphosphates, included in this product, help to inhibit scale build up in hot water heaters (both standard (gas or electric) and tank less styles) and boilers; Helps extend the life of hot water heaters and hot water using appliances, pipes, and downstream plumbing fixtures such as faucets and shower heads
  • MAINTAINS EFFICIENCY: By inhibiting scale build up on heating elements, helps maintain water heater efficiency
  • EASY TO REPLACE: Easy change out of the 3M Aqua-Pure AP431 Replacement Water Cartridge makes system maintenance easier
  • HIGH FLOW RATES: 3/4 Inch NPT inlet/outlet connections for easy installation and high flow rates (rated for up to 10 GPM); System to be installed on cold water line feeding the water heater
  • CORROSION RESISTANCE: 304 stainless steel head can be installed on existing copper pipes in the home; It consists of a corrosion resistant material that provides long service life
  • NSF STANDARD 42 CERTIFIED: Tested by NSF International to NSF/ANSI Std; 42 for material and structural requirements only
  • PRODUCT SPECIFICATIONS: System has a pressure range of 25 to 125 PSI (862 kPa) and operating temperature of 40 to 100F (4.4 to 37.8C)
  • IDEAL FOR any size home

User questions & answers

Question: Just received. It appears a lot of water bypasses the filter, can someone confirm this is not the case? Mine is just like customer uploaded photo
Answer: Not a filter, a water treatment cartridge. Rated at 10gpm by the manufacture, a small amount of the water flow is diverted down into the cartridge through a single hole in the elevated tab, in the center of the tee. The polyphosate is slowly dissolved and a small amount of treated water flows back up and out 3 small holes around the elevated tab. According to the manufacture it only takes 2-3 parts per million to treat for scale. A little bit will do ya.
Question: Does this help with water spots on glasses and scaling on bathroom fixtures
Answer: We have a lot of calcium in our well water. The heat from the hot water tank is what causes the minerals to form scale. We placed this on the cold water side of the hot water tank and noticed a big improvement in water quality, especially on shower doors and dish washer. I have changed it twice now. The first time at 3 mos because the info says it can clean up existing scale in pipes and fixtures. The bottom line is if your water is very hard that will affect how much benefit you get from this product. So will you be happy with a 50% improvement in quality? I know I am cleaning faucet screens a lot less. Still have a jug of vinegar around though! Hope this helps.
Question: GPM seems to low. I have 2 Tankless units, EACH one does 9 GPM
Answer: we have an electric tank less that is rated at 4.5 GPM. We have very hard water in this part of MA and also have a well. We have been in this house for 30 years and have had problems with pipes rotting away. When we installed the electric tank less we installed this filter also. We used the heater for a few months and than had the plumber perform the maintenance suggested by the tank less mfg. It was clean as a whistle. Our flow rate is not as high as yours but if you had one in line with each heater - i would think it would work fine. Our heater used 120A for 4.5 GPM - if yours is electric it most use a lot of power! For our use I am very satisfied with the filter and given our water quality situation and how clean the heater was - i would highly recommend this filter.KR in MA
Question: Can this system be installed with the filter in the horizontal position (copper pipe is running vertically
Answer: In my opinion, if this is collecting any particles before getting into Tankless water heater, the particle should fall in vertical direction so filter should be installed in vertical direction. I installed my filter in vertical direction before cold water is getting in to the tankless. In order to get a right answer, it would be the manufacture because they are the one who designs the filter.

Product features

Scale Inhibition System

Ecosmart ECO 18 Electric Tankless Water Heater, 18 KW at 240 Volts with Patented Self Modulating Technology,White

EcoSmart

Based on 3 reviews Check latest price

Product description

This Smart Technology electric tankless water heater is configured as a "whole home" model for climates where incoming water temperature is 62°F and above. The ECO 18 is capable of heating over 2.5 gallons per minute, which is the equivalent of one water saver shower head (with a 1.5 gpm flow) and one sink with a low inlet water temperature of 62°F, and an output setting of 105° F. Two showers emitting no more than 1.5 gpm each can be run simultaneously when incoming water temperature is above 70° F. Digital temperature control allows you to set your temperature in increments of 1°. All tankless water heaters are sized based on flow rate and temperature rise, and there is a direct relationship between the two. So if used in a cold area requiring a high temperature rise, it will be more limited in the amount of fixtures (gallons per minute) it can heat at one time compared to a warmer climate. However, when sized properly it will provide endless hot water and only consume the energy needed, giving the user complete control. Prior to purchase and installation please verify this model is the right size for the expected demand and electrical requirements. The ECO 18 requires a minimum 150 amp electrical panel for installation with 40 amp double pole breakers connected to sets of #8 awg wire. Plumbing connections are 3/4" NPT. For additional assistance please feel free to contact our support center at 877-474-6473.

From the Manufacturer

This Smart Technology electric tankless water heater is configured for climates where incoming water temperature is 62 Degree F and above. The ECO 18 is capable of heating over 2.5-Gallon per minute, which is the equivalent of one shower head (with a 1.5 gpm flow) and one sink with a low inlet water temperature of 62 Degree F. Two showers can be run simultaneously when incoming water temperature is above 70 Degree F in warmer climates such as South Texas, South Florida, New Mexico, Arizona and South California. These models come with a digital temperature control that allows you to set your temperature in increments of 1 Degree. Prior to purchase and installation please verify this model is the rights size for your hot water needs and electrical requirements.

  • The product is highly durable
  • The product is easy to use
  • Manufactured in China
  • Copper and stainless components
  • Lifetime warranty for residential use
  • Save up to 60% on your water heating costs with the most advanced, self modulating technology available
  • Never run out of hot water with an ECOSMART tankless water heater.

User questions & answers

Question: How do know which size to buy? We will supply two bathrooms, dish washer, clothes washer. What size should I choose
Answer: I noted someone below stating they got the largest one and they can only run one water source at a time. My guess is they installed it wrong by not getting the electric hooked up right, or maybe the unit was just defective, or they live in Alaska. I went under size with an Eco 27 a few years ago because that’s all my electric panel could handle. We have zero issues in the summer. During winter months we can only run one shower at a time and have to slowly fill a tub (maybe 3/4 fill speed). To save as much money as I am on electric bill and have unlimited shower lengths (only 1 person at a time mid-Dec to mid-March) is totally worth it. On here today because I’m thinking of upping my panel size so was thinking of going with a larger one now. Regardless, CCRC’s experience with the largest unit not working is nothing like the experience I’ve had, and again I intentionally undersized mine for the house. The website has a clear chart to explain size you need based on number of water fixtures in your home and ground water temperature.
Question: Can this unit supply a 3,700 sq foot home with 3 1/2 baths
Answer: In the lower states it can, but in the northern states, multiple simultaneous users, it will be overloaded. If you can afford a 3,700 square foot home, then you can place a unit in each appropriate demand zone and be very glad you did. I love mine, live in KY, get great supply when the water is above 60 degrees, and then it slows the flow as the temperature drops. I have dishwasher, washing machine, garden tube, 2 showers, 3 sinks and 4 people. It is better than great in the summer, okay spring and fall, and we are conservative in the winter.
Question: What is the power consumption of this tank-less heater
Answer: The instantaneous power consumption while the hot water is running is quite high (up to 18kW or 27kW depending on which model you’re looking at on this page). However, when no hot water is being used, the power consumption is 0 (or a minuscule amount to run an LED light or something). The total power consumption over the course of several days or longer should be much lower than a tank heater but the short term power usage while the heater is making hot water will be much higher than a tank heater. It’s just that the unit sits idle most of the time while a tank heater will use power fairly frequently even when no hot water is needed as the water in the tank cools off over time and needs to be re-heater fairly constantly
Question: remote
Answer: This unit does not have the ability to have a remote temperature control.

Product features

3 Smart Steps for Endless Hot Water

Step 1: Determining your average inlet water temperature is important, this allows you to determine how well your unit will perform in your desired location. A lower inlet water temperature will require a higher kilowatt product.

Step 2: Next you will determine how many applications your unit can run simultaneously at your chosen location inlet water temperature. Tankless electric water heaters are sized for maximum simultaneous use, not maximum fixtures in your home.

Step 3: Determining specifications and electrical infrastructure is important because without the correct infrastructure your unit may not fit into your breaker panel.

Rinnai RU199iN RRU199iN, RU199in-Natural Gas/11 GPM

Rinnai

Based on 204 reviews Check latest price

Product description

Rinnai RU199iN Tankless Water Heaters, 11 GPM, RU199in-Natural Gas/11

  • Endless hot water for your entire home
  • RU199in Sensei SE+ Super High Efficiency Tankless Hot Water Heater - Natural Gas: Indoor Installation Only
  • Up to 11 GPM hot water flow rate (varies by groundwater temp)
  • Circ-Logic technology allows you to set recirculation patterns that coincide with your typical habits. Hot water is available when you need it!
  • Residential Factory Warranty - 120 months (heat exchanger), 12 months (labor), 60 months (parts)

User questions & answers

Question: How many BTUs
Answer: The expansion tank for this heater is not required. Most people already have these installed in their homes but if not then it would be Ok without it as there is a pressure relief valve on top if something happened. GlobalTowne is an authorized Bosch distributor.
Question: What recirculation pump will work with this heater
Answer: A standard flow shower head is around 2.5 gallons per minute. A low flow head is around 1.5 gallons per minute. The recovery rate for a 90 degree temperature rise is 6.8 gallons per hour! So even the 7.5 gallon unit would only provide 4 minutes of shower time before the temp dropped off dramatically. (even at the low flow rate..)
Question: What is wi-fi ready means and what what will you use it for ? also what circ-logic capable means? do you need recirculation pipe for it
Answer: If your bathtub is bigger than your main heater tank, this unit isn't going to do much for you. It will add 2.5, 4, or 7 gallons to the capacity of your main tank, depending on which Bosch unit you buy. The 7 gallon unit requires a specially wired circuit. You will also get a little bit of lukewarm water that was in the line between your main heater and the Bosch unit. Unless your main tank is awfully small and your bathtub massive, the 4 gallon unit should work for you. Maybe a demand type thankless heater in your bathtub hot water feed would be a better choice, but be careful to size it properly for your desired flow rate and temperature rise. Also a tankless is likely to require special wiring.
Question: Does this unit come with a vent kit? Thanks
Answer: When the tap is opened, the hot water in the unit flows out. The colder water that was sitting upstream of the unit, enters the unit to be heated. If the tap remains open, the newly heated water flows out, being replaced eventually, (depending on the distance to the main water heater), with the water from the main water heater. You will probably set the unit temperature to equal the main water heater temperature, if you want to keep a constant temperature, but other scenarios are possible.

Product features

Endless Hot Water

Put an end to scheduling your hot water need.

  • Never again choose between taking a piping hot shower, doing a load of laundry or running the dishwasher. A Rinnai Tankless Water Heater will never run out of hot water and leave you in the cold.

Hot Water On-Demand

Don't waste while you wait.

  • Rinnai tankless water heaters with ThermaCirc360 technology recirculates hot water through your pipes to get you hot water fast.
  • While you wait for hot water to travel from your old tank to your shower, you can waste the equivalent of twenty-four 16-ounce bottles of water every time. ─ that means an average of 8,700 bottles of water per person, per year.

Save Valuable Space

Your hot water heater doesn't have to be a behemoth!

  • Compact design allows for installation in non-traditional spaces such as the attic, crawl space or even a closet.
  • Save 16 sq. foot of space ─ the Rinnai tankless water heater is only the size of a small suitcase.

Affordable, Efficient Savings

Efficiency packaged in a compact design means cut CO2 emissions (as compared to tanks), use less energy and conserve water.

  • Use 40% less energy than traditional tanks* because you heat water only when you need it.

100 years of Confidence

Get peace of mind with the unsurpassed quality and innovation of a Rinnai tankless water heater.

  • Trust the #1 selling gas tankless water heating brand in North America for all of your water heating needs.
  • Smart technological advancements such as WiFi monitoring, your trusted Rinnai service provider can monitor the efficiency of your tankless water heater and address issues before you ever experience a break in service.

Sustainable Reliability

It's a smart investment for now and the future when you intertwine sustainability and reliability.

  • Every part of a Rinnai Tankless water heater is replicable so components can be easily swapped vs. buying a whole new system.
  • Average life expectancy is 20 years vs. 8-10 for a traditional tank**
  • With this premium product, you'll save–both money and worry–in the long run.

Electric Hot Water Heater 110-120V Compact Mini-Tank Storage,Small Output 2.5-3.0 Gallon, 1.5KW Kitchen Instant Under Sink Point-of-Use, RV 1 PCs 16” Long 1/2”FIP Stainless Steel Water Hoses

Based on 87 reviews Check latest price

Product description

 Color:BIS03-White (no remote control)



FEATURES



Mini-Tank Water Heater comes with 1.5kW heating element, expect hot water for 3 seconds, perfect choice for sinks to provide endless hot water any time.



ENERGY SAVING



This tankless water heater avoids standby heat loss of those bulky storage water heaters, minimize energy waste and achieve 95% energy saving with help of its smart self adjustment technology.



HEALTHY WATER QUALITY



MULTIPLE SAFETY PROTECTIONS



Over temperature protection



Dry heating protection



Leakage protection



Water and electricity line separated



EASY INSTALLATION



Real compact design, water heater cooridates with scenes decor, under sink water heater, Can be shelf, wall or floor mounted. Comes with easy installation brackets, pipe fitting of 1/2" NPT and 10AWG power cord(fixed to the unit) so you don't to have to hire a plumber even if you can do it.



SPECIFICATIONS



Power: 1.5kW



Voltage: 120V~50Hz



Min. water flow to activate the unit: 0.475GMP



Maximum temperature 167°F



Max. Amperage: 15A



Recommended wire size: 10AWG



Required circuit breaker : 1x1-Pole 20 AMP



KINDLY NOTE



1.The equipment is mainly used for sinks.



2.Mini-tank water heater should be installed professionally.



3.Please read instruction manual carefully prior to installation and use!

  • The label on the right of the product is to allow customers to use the product more energy-savingly. We will improve the language expression in the future. We are very sorry.
  • 【NOTE】Fill the water first, then power on (otherwise it will damage the water heater).
  • 【SAFE DURABLE & LONGEVITY】304 Made of stainless steel and never rust,Anti-leakage plug,Multiple safety protection functions protect you from the risk of scald, leakage or other injury.Premium plastic shell is corrosion resistant,This mini hot water heater is ideal for kitchen, bar, school, hospital, community and RV.
  • 【SMART INVERTER FOR ENERGY SAVING】Digital Display,Automatic heat preservation and storage of hot water, 3.0 gallon point-of-use mini-tank fits under your sink to provide hot water right where you need it. Thermal efficiency is 98%,Maximum temperature167℉,The built-in smart chip heats up to the temperature you set, and automatically Insulation when heated to the specified temperature.
  • 【EASY TO USE】storage tank electric water heater with easy-to-operate knob temperature adjustment design,Easy to control warmth.Vent valve, Tee pipeline, pipes and other accessories are complete for quick installation without additional expenses or preparing time of accessories.
  • 【FAST RECOVERY RATE】Eliminates long waits for hot water at your sink, get on demand hot water at your every need (supplies up to 2 sinks at a time,8-15 minutes to heat to your desired temperature).
  • 【COMPACT DESIGN】Can be shelf, wall or floor mounted (Water inlet and outlet upward); Dimensions: 18.0''L x12.6''W x10.2''H; 8.86lbs; 1/2″NPT NPT. 1.5 kW, 110-120 volts. One-year warranty and 24H customer service support, feel free to contact us.

User questions & answers

Question: Can I connect the water intake on this unit from the hot water supply from my house water heater? The house heater is very far from kitchen sink
Answer: Yes you can connect this unit to the hot water supply line from your existing hot water heater and have hot water delivered to your kitchen sink. This unit will reheat the hot/warm water to the desired temperature. This should ensure you have continued hot water.
Question: what is the lowest temperature this can be set at
Answer: 86℉
Question: Brass tee provided does not seal on the hot water outlet, any tips
Answer: The brass 3 way T is not meant to connect to outlet nipple. It needs the 1/2 in compression connector provided with it.
Question: Can this be mounted laying down or does it have to be in a vertical position
Answer: It is vertical

Product features

AGU 1.5Kw Mini-Tanks Water Heater Electric

Features

Saves Energy and Money - No need to preheat before using,no any waste for water or electricity.

Endless Hot Water - Digital Display,Maintenance-free bare wire heating systems.Depending on the region, the water temperature can be heated to 167℃ within 8-15 minutes.

Space Saving - Very compact designed, which can be wall-hung (bracket included) or floor-mounted,easy to install.

Hot water on call

Waiting for hot water at a sink located far from a primary heating source can be frustrating. Only having access to cold water from a sink is just not useful, and plumbing a hot water line to every sink in a home or business requires time and money. To get hot water where it’s needed, when it’s needed, a better solution is to use the AGUST: a point-of-use electric mini-tank heater. This heater can supplement a primary water heating source, or be used under a single sink and double sink. In fact, the AGUST can be used for three different applications: as a sole water heating source for a single sink, as a supplement to an existing heater located far from the sink, and as a buffer installed in-line with tankless water heaters that experience intermittent cold water, also known as 'cold water sandwiching'. No matter the configuration, there’s minimal stand-by loss from this premium mini-tank water heater.

INSTANTLY HOT WATER

As soon as you open the tap, the water flows with your desired temperature. The water is only heated in the amount and for the time you actually need it.

ENERGY EFFICIENT

It saves energy by producing hot water only when needed. Instant hot water flows out at anytime you need.

KNOB ADJUSTMENT

Equipped with a Knob adjustment control for stable temp. easy and convenient. Just turn the knob to the maximum and submit the temperature suitable for you through the faucet,Optimal energy efficiency is promised.

GREAT FOR SMALL SPACES

Water heaters are compact,It can be installed under the sink features a sleek and attractive design to blend seamlessly with decor, very friendly to any small spaces.

Immersion Water Heater, 1500W Electric Water Heater with Stainless Steel Protective Cover, Submersible Instant Hot Water Heater for Pool, Bucket, Portable Bathtub, Basin, Winter Washing

Based on 131 reviews Check latest price

Product description

Immersion Water Heater, 1500W Electric Water Heater with Stainless Steel Protective Cover, Submersible Instant Hot Water Heater for Pool, Bucket, Portable Bathtub, Basin, Winter Washing



Specifications:

Voltage:110 Volts

Power: 1500W

Material: stainless steel

Weight: 500g

Size:10.2 x 1.8 x 2.2 inches



Package:

1*immersion water heater

1*LCD digital thermommeterr

  • [High Power Water Heater]: Please do not use it over 1.5 hours every time. The electric water heaters power is 1500W and voltage is 110-125V. It will quickly heats 5 gallons of water in few minutes with high power and heat the water to 104 degrees F takes about 30 minutes (Takes longer in winter).
  • [Prime Quality and Safe]: It consists of copper wires that can carry more electricity, ABS materials and stainless steel protective shells. All the components which is rigorously tested high-performance heat-resistant. The good quality immersion heater are safer and more durable.
  • [Multi-purpose and Portable]: This portable water heater fit for heating water in large size container like bucket, basin, portable bathtub, mini inflatable swimming pool, etc. Our electric water heater is not only small in size but also super light in weight, perfect for concrete work, farms, car snow cleaning, wallpapering, winter washing, camping, travel, etc.
  • [How to Use It]: Please completely immerse the heater in the water you need to heat, connect the power supply and wait for 20 minutes (the heating speed is different for different amounts of water).
  • [Warning! ]: 1.Due to the excessive power, please don't plug the two heaters into the same socket to avoid fire. 2. In order to extend the service life, please do not exceed 1.5 hours each time. 3. Before touching the water, turn off the outlet switch and remove the immersion heater!

User questions & answers

Question: Why can it not be used in a metal tub
Answer: Because a metal tub could conduct electricity (through the water) and create a grounding fault. Also, if you have a metal tub you could induce galvanic corrosion and damage the heating element and the tub.
Question: Can you heat water while continuing to fill tub
Answer: I would fill enough water to completely imerse the unit before plugging in. Important: use a GFI outlet (modern bathrooms meet code) for safety. Unplug unit before entering water. Time to reach desired water temperature will depend on starting water temperature, volume of water to heat. 10 gallons from 78 degrees should take 15 minutes to reach 105 degrees. Hope this is helpful.
Question: Can you run in 55 gallon drum all day
Answer: I have only ran it in a 5 gallon bucket and it has the water boiling in it in just minutes.
Question: Why do you have to remove it before you touch the water
Answer: It is not built well enough to guarantee that it is completely electrically insulated from the water. You could get a shock, though i haven’t yet. If you were to soak in a tub with this thing on, it could give you a prolonged shock that can kill, similat to a hair dryer dropped in a tub.

Tankless Water Heater, GASLAND Outdoors BE158 1.58GPM 6L Outdoor Portable Gas Water Heater, Propane Water Heater, Overheating Protection, Easy to Install, Use for RV Cabin Barn Camping Boat, White

Based on 438 reviews Check latest price
  • 🎁【CSA Approved Safety 】CSA approved Gasland tankless water heater, safe as per Canadian and US Standard. Flame failure device, anti-freezing protection, over heating protection to ensure the family safety. Automatically decrease water pressure between 2.5-110PSI. The anti-freezing drain plug can discharge the residual water to avoid freezing in cold areas or in case of long time no use. High water temperature protection over 167 °F. Shut off gas supply automatically under unexpectable flameout.
  • 🎁【Lightweight Portable Design】 Compact size and lightweight design for easily carry. It can bring a amazing hot shower for you when you are camping, to the beach, etc. Also you can wash your pets with this tankless water heater in outdoor. Hang it using the mounting bracket on the top/back of the gas water heater. It only takes you a few minutes to install it. Or you can install it according to the instructions.
  • 🎁【On Demand Hot Water】 Maximum power output 41,000BTU/Hr, get instant endless hot water easily wherever you are. No need to preheat before using tankless water heater. As soon as you turn on the tap, the water flows with your desired temperature. Low water pressure start up, just need 2.5 PSI of water pressure. 1.58 gallons per minute of on-demand hot water. Fully adjustable heat and water flow.
  • 🎁【Energy Saving】 Compact and light weight structure with 11.5% energy saving technology. The propane water heater exchanger and main burner are desinged with advanced combustion technology to decrease gas consumption and burning noise. You will save more when you use our tankless water heater.
  • 🎁【Excellent Customer Service】We have professional team to offer you excellent service. If you have any question, please feel free to contact us from Monday to Friday.

Product features

WARM TIPS

√ 1、When install the water heater please do not over tighten the connectors and pipes to prevent it from bursting and leaking.

√ 2、The exhaust and top will get hot, please check around area for flammables, especially gasoline or other vapors which may ignite. Please make sure there are no foreign objects around the portable tankless water heater or have fallen into the top.

√ 3、A gas leak detection is needed before use and please do not use flame for leak detection. Soapy solution, gas detectors, etc. are recommended to detect leaks.

√ 4、Please use only liquid propane as fuel and use it in a well-ventilated place.

√ 5、Please make sure there is enough water pressure. If the water pressure is below 2.5 PSI, the water heater cannot be ignited.

√ 6、If the outside temperature is around or below freezing(0℃/32℉), please ensure to drain out the water after each use to avoid internal damage to the heat exchanger.

√ 7、This water heater is not suitable for high altitude areas over 3300 feet and strong wind conditions.

Outdoor Showers

Enjoying outdoor shower with endless hot water during camping trip.

On demand hot water

No need to preheat before using tankless water heater

Bathing Horses

Offering your horse with a relaxing shower in the afternoon.

Washing Dogs

Providing a comfortable sunbath for your pet dog.

EASY TO USE

110V-120V Electric Mini-Tank Hot Water Heater Storage,1.5KW Kitchen Household Compact Size Point-of-Use, Hot Water Output of 2.5 Gallon, 1 PCs 16” Long 1/2”FIP Stainless Steel Water Hoses

Based on 293 reviews Check latest price
  • 2 PCs 16” long 1/2”FIP x 1/2”FIP,Stainless steel water hoses ,Vent valve,included
  • 【NOTE】The cold water pipe has a safety valve, which is marked with a water pressure of 0.75MPa. When the water pressure in your home is greater than this value, the safety valve will automatically drain. At this point, you only need to contact us, we will send you a 0.9MPa exhaust valve, you can solve this problem
  • 【SAFE DURABLE & LONGEVITY】Made of stainless steel and never rust,Anti-leakage plug,Multiple safety protection functions protect you from the risk of scald, leakage or other injury.Premium plastic shell is corrosion resistant,This mini hot water heater is ideal for kitchen, bar, school, hospital, community and RV.
  • 【SMART INVERTER FOR ENERGY SAVING】Automatic heat preservation and storage of hot water, 2.5 gallon point-of-use mini-tank fits under your sink to provide hot water right where you need it. Thermal efficiency is 98%,Maximum temperature167℉,The built-in smart chip heats up to the temperature you set, and automatically Insulation when heated to the specified temperature.
  • 【EASY TO USE】storage tank electric water heater with easy-to-operate knob temperature adjustment design,Easy to control warmth.Vent valve, Tee pipeline, pipes and other accessories are complete for quick installation without additional expenses or preparing time of accessories.
  • 【FAST RECOVERY RATE】Eliminates long waits for hot water at your sink, get on demand hot water at your every need (supplies up to 2 sinks at a time,8-15 minutes to heat to your desired temperature).
  • 【COMPACT DESIGN】Can be shelf, wall or floor mounted (Water inlet and outlet upward); Dimensions: 13.0''L x11.4''W x10.6''H; 9.5lbs; 1/2″NPT NPT. 1.5 kW, 110-220 volts. One-year warranty and 24H customer service support, feel free to contact us.

User questions & answers

Question: How is it that this is energy efficient if it constantly maintains a heating temperature that you can use on demand? Is there an off/on switch
Answer: Most rinnai tankless weather it is out door or indoor, have a control board to adjust temp and either on or off
Question: I connected the water in the water heater already. But the pressure didn’t pumt the water to the sink
Answer: It can definately be out doors in freezing temps, tho power failure arent good for it while in a freeze, tho keep in mind it will use alot more energy for frost protection, indoor units are safer amd more efficient in this case
Question: Can I connect the water intake on this unit from the hot water supply from my house water heater? The house heater is very far from kitchen sink
Answer: I bought model V65EN. It came with a wired digital controller. The installer did not run the wire into the house and mount the controller indoors. He simply set the controller at 120 degrees and left the controller inside the unit. If I want to change the temp, I have to take the cover of the unit.
Question: Will this work for an outdoor shower
Answer: Good place to check for info like this is Wikipedia. Here is what they say: Energy efficiencieseditMore tangible cost savings are defined when comparing the energy efficiencies of gas heaters with low NOx emissions with conventional flued types. Gas heaters with emission problems are flued and inherently lose substantial energies in the form of hot flue gases to the atmosphere. In addition, the choice of placement of flued heaters is greatly impaired due to flue installation restrictions.In contrast, dedicated low emission gas heaters do not require a flue system. Furthermore, with the introduction of oxygen depletion sensors and thermostatic controls, they do not place critical reliance on ventilation as previously was the case. These heaters can be positioned more conveniently and centralised to affect optimum warm air distribution. By definition unflued low NOx gas heaters are 100% efficient as all heat energy released from the flame is converted to useful heat.Hope this helps. June

Product features

BIS 1.5Kw Mini-Tanks Water Heater Electric

Features

Saves Energy and Money - No need to preheat before using,no any waste for water or electricity.

Endless Hot Water - Maintenance-free bare wire heating systems.Depending on the region, the water temperature can be heated to 167℃ within 8-15 minutes.

Space Saving - Very compact designed, which can be wall-hung (bracket included) or floor-mounted,easy to install.

Hot water on call

Waiting for hot water at a sink located far from a primary heating source can be frustrating. Only having access to cold water from a sink is just not useful, and plumbing a hot water line to every sink in a home or business requires time and money. To get hot water where it’s needed, when it’s needed, a better solution is to use the BISELONG: a point-of-use electric mini-tank heater. This heater can supplement a primary water heating source, or be used under a single sink and double sink. In fact, the BISELONG can be used for three different applications: as a sole water heating source for a single sink, as a supplement to an existing heater located far from the sink, and as a buffer installed in-line with tankless water heaters that experience intermittent cold water, also known as 'cold water sandwiching'. No matter the configuration, there’s minimal stand-by loss from this premium mini-tank water heater.

INSTANTLY HOT WATER

As soon as you open the tap, the water flows with your desired temperature. The water is only heated in the amount and for the time you actually need it.

ENERGY EFFICIENT

It saves energy by producing hot water only when needed. Instant hot water flows out at anytime you need.

KNOB ADJUSTMENT

Equipped with a Knob adjustment control for stable temp. easy and convenient. Just turn the knob to the maximum and submit the temperature suitable for you through the faucet,Optimal energy efficiency is promised.

GREAT FOR SMALL SPACES

Water heaters are compact,It can be installed under the sink features a sleek and attractive design to blend seamlessly with decor, very friendly to any small spaces.

Ecosmart POU 3.5 Point of Use Electric Tankless Water Heater, 3.5KW@120-Volt

EcoSmart

Based on 531 reviews Check latest price

Product description

This electric tankless water heater is a true Point of Use Model because it is specifically designed for under the sink, single applications with a maximum flow rate of 0.5-Gallon per minute (gpm) and includes a 0.5 gpm sink aerator. This heater is flow controlled, meaning the temperature will adjust according to flow rate. It is the smallest sized Ecosmart electric tankless model and should not be used to run anything more than one sink at a time or used in areas where inlet water temperature is lower than 57°F. At this inlet temperature the ECO POU 3.5 can heat 0.5 gallons per minute to 105°F. Its compact size allows for under the sink installations. The Point of Use models are ideal for: Wet Bars, Strip Malls, Doctor's Office, Boats, Recreational Vehicles (RVs), Bathroom Sinks. When sized properly this water heater will provide endless hot water. Prior to purchase and installation please verify this model is the right size for the expected demand and electrical requirements. The Eco POU 3.5 requires a minimum 100 amp electrical panel for installation with 30 amp single pole breaker connected to #10 awg wire. Plumbing connections are 1/2" NPT. For additional assistance please feel free to contact our support center at 877-474-6473. TROUBLE SHOOTING STEP: When the water is not hot enough, please slow down the flow of water to increase temperature!

From the Manufacturer

This electric tankless water heater is a true Point of Use Model because it is specifically designed for under the sink, single applications with a maximum flow rate of 0.5-Gallon per minute (gpm) and includes a 0.5 gpm sink aerator. Its compact size allows for under the sink installations. The Point of Use models are ideal for: Wet Bars, Strip Malls, Doctor's Office, Boats, Recreational Vehicles (RVs), Bathroom Sinks. Prior to purchase and installation please verify this model is the rights size for your hot water needs and electrical requirements.

  • Can provide hot water for one sink at 0.5 GPM in warmer climates
  • Requires 1 x 30 amp breaker and 10 AWG wire
  • For one sink at 0.5 GPM in colder climates the POU 6 is recommended
  • Amperage Draw 29 amp. kW - 3.5 kW
  • Connection Fittings 1/2" NPT

User questions & answers

Question: Can the flow rate be adjusted up from 0.5gpm to say 1gpm or 1.5gpm (understood that the output water will be corresponding less hotter)? thanks in adv
Answer: This is a 199,000 btu model, a 3/4" gas line is required to have sufficient gas supply.
Question: degree water going in what degree will be at the tap
Answer: rinnai recommends the GTK03 Grundfos kit for this unit
Question: are any of these tankless water heaters plug in
Answer: I think, you need buy a WiFi module, call Rennai and ask. Circ-logic did not work for me, I had to install re circulation pipe. Because of the high minimum flow requirements, this unit did not work with any regular re circulation pump, so wasted money buying a Watts pump. And paid double for the labor. Rennai told me that I should have bought their thankless heater with re-circulation built in.
Question: Would you recommend this model for a shower in a guest bathroom
Answer: IT CAME WITH ADAPTERS ON THE TOP. NO PIPING.

Product features

3 Smart Steps for Endless Hot Water

Step 1: Determining your average inlet water temperature is important, this allows you to determine how well your unit will perform in your desired location. A lower inlet water temperature will require a higher kilowatt product.

Step 2: This product is fixed flow, which means that the output temperature rise of this product is determined by flow rate of the application. This chart gives you the expected temperature rise for various sink flow rates from 0.5 to 1.5 gallons per minute.

Step 3: Determining specifications and electrical infrastructure is important because without the correct infrastructure your unit may not fit into your breaker panel.

Ariston Andris 4 Gallon 6 Year 120-Volt Corded Point of Use Mini-Tank Electric Water Heater

Based on 387 reviews Check latest price

Product description

The Ariston Andris 4 Gal. 6-Year Corded 120-Volt Point of Use Mini-Tank Electric Water Heater has a mini tank that eliminates the long trip through pipes that water usually has to take from the water heater to the sink. This powerful, yet compact water heaters purpose is to provide you with hot water, when and where you need it. Installation has never been easier, with a simple tap into a cold water line and a standard 120-Volt outlet. The mini tank is perfect for smaller properties including, in- law suites, kitchenettes, pool houses, garages and can even be used for commercial applications like stores, offices and bathrooms. Created with versatility in mind, the mini tank can be wall mounted with the brackets provided or placed on the floor to fit your desired space. This highly efficient water heater boasts environmentally safe foam insulation and also comes with a durable titanium glass lined tank backed by a 6-year limited warranty.

  • EASILY ACCESSIBLE HOT WATER: Compact designed 4 gallon mini tank. Provides instant hot water at point of use. 6-year limited warranty on tank, 2-year warranty on parts. Wall or floor mounted unit (wall brackets & rubber feet included).
  • DO IT YOURSELF INSTALLATION: 1440-Watt heating element draws 12 Amp. 65°F-161°F temperature range. Easy installation thanks to a standard 120-Volt outlet.
  • CAN FIT VIRTUALLY ANYWHERE: Dimensions (pipes included): 14.25"W x 14.25"H x 12.75"D; Water Connection: 1/2" NPT
  • ELECTRICAL CONNECTION: Plug-in; Relief Valve: Factory Installed; Recommended Circuit Breaker Size: 15A
  • QUALITY YOU CAN COUNT ON: TitanShield, exclusive technology that fully protects the tanks inner surface against corrosion. Robust environmentally safe foam insulation to increase energy efficiency. Eliminates the need for a recirculation line.

User questions & answers

Question: Can this be mounted horizontal
Answer: How long does it take to heat the water when turned on?
Question: When we went to connect the water connector tube to the red ring hot water outlet it would not fit. There was a red tub in the outlet that prevented t
Answer: Yes, you are correct, one of the units I installed had the same issue with the red plastic fitting liner protruding, and it cannot be pushed in or removed. I solved the problem by filing the plastic down to just above the metal pipe. Make sure to keep it level and remove burrs. Another fix would be to use standard pipe fittings such as putting a street ell on the tank nipple then connecting your flex hose to that - use brass or stainless fittings and pipe dope.
Question: Has anyone used a t-valve to hook this to their toilet inlet line? I'd like to split the toilet line, install this, then attach my sprayer bidet
Answer: Yes you can, but you know, you can buy a bidet with a water on demand heater built in it ! much better and you are not reheating 2.5 gals of water after each use. Check on Amazon or Wish for a bidet, it is not expensive .
Question: Does it need its own breaker
Answer: Yes and no, it depends on where you are robbing the power from ,if it is from a circuit with very little use like bath wall outlets only ( like I did ) I would say no ,but if its from a circuit with heavy use, I would say yes, also what are you going to use the hot water for ? in my case, I use mine at the wash basin only so it is not heating continuously. .

Product features

ANDRIS RS 4 GALLON ELECTRIC MINI TANK WATER HEATER
SINGLE FAUCET UNIT

  • Remote locations
  • Single water line
  • Wall or floor mounted
  • Eliminates the need for a recirculation line
  • Easy Installation

BOOSTER UNIT

  • Improve existing capacity
  • No waiting time
  • Load reduction
  • Eliminates the need for a recirculation line
  • Built-In redundancy

SINGLE FAUCET OR BOOSTER UNIT IN A WATER HEATING SYSTEM

This compact yet powerful hot water heater supplies instant hot water to even the most remote locations:

  • Smaller/Second properties
  • In-Law suites, Kitchenettes
  • Sinks located far from water heater: Pool House/Garages
  • Supplemental hot water for high-flow fixtures
  • Commercial bathroom sinks

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