14 best dryer vent boosters

Product description

Versatile and durable this 4" metal in-line exhaust fan features high pressure air handling performance with low noise and extremely low power usage. This fan and control combination can be used to activate this fan as another appliance, fan, or other device receives power. Often used for Duct Booster, Dryer Boosting, Equipment Cooling, Factory Exhaust and many other applications. The Sun court Current Switch is designed to turn 120 VAC devices on when it senses and input current. The Current Switch is UL 94-V0 rated for safety of flammability of plastic materials for parts in devices and appliances. The output switch rating is 120 VAC with a running frequency of 45Hz to 65Hz and its max ambient temperature is 140°F.

• 4" metal in-line duct booster
• 200 CFM
• Includes Current Sensor Switch
• Made in the U.S.A

User questions & answers

Question:	How long of a wire does the sensor come with
Answer:	The sensor comes with no wire. It works on the existing wire running to the dryer but will also need to be connected to a wired 110/120 volt outlet that the blower motor plugs into which if you dont currently have at the location you mount the blower motor, will need to be done. So you will need to know the distance from either your electrical breaker box to the blower motor (routing past the sensor mounted at the dryer) or if you have an existing 110/120v outlet near the dryer that you can tap into and run to the sensor and then down to the blower motor.
Question:	Installed 6-28-2017; Installed a lint trap right before it. By 3rd load of laundry fan is hot, stops by itself w laundry still running, Defective
Answer:	Mine is 2 yrs old & works perfectly. Also have lint trap above the dryer & clean it after every load. Amazed at how much gets by the primary filter. Maybe your filters are plugged or something is stuck in the fan itself. If not that sounds like it's defective. Wiring OK?
Question:	Will this vent clog with lint? Did you require an electrician to wire
Answer:	I have this installed for about a year now, and not had any lent problems. This came with a plug on it, so all I did was plug it into a power strip and I turn it on every time we run the dryer . Hope this helps
Question:	Does it come with a mounting bracket
Answer:	Yes, mounting bracket is included. It is the silver part next to the cord in the picture.

Product features

Tjernlund M-49504351 In-Line Fan with Current Sensor Switch Dryer Duct Booster

If your dryer is not close to an outside wall and the exhaust pipes has to snake throughout the home to vent to the outside your clothes dryer's performance will suffer. The fan within the dryer is only so powerful and adding a dryer booster fan will decrease drying times, especially with heavy loads like towels, blankets, etc.

Also, add this to have the booster fan decrease lint build up (and the risk of dryer fires) by keeping the lint moving at 1200 FPM so it doesn't stick to the vent pipe.

Product description

This is a genuine replacement part. The model number and name for the following item is: Fantech DBF110 Fan

• CFM: 167

User questions & answers

Question:	I'm thinking of buying one but will I still be able to have my duct cleaned after it is installed? I'm the thinking it will be in the way
Answer:	It probably will be in the way. My handyman chose to detach it to clean the duct and then reattach it. It wasn't a major job.
Question:	can this be used with gas dryer
Answer:	It is activated by the pressure in the exhaust tube and runs on it's own hard wired power supply. I did not see anything on the product description that specifies that it cannot be used with a gas dryer. You could always contact Fantech Customer support: Customer Care10048 Industrial BlvdLenexa KS 66215Tel: 800.747.1762Fax: [email protected]
Question:	Do you nnee a lint catcher with this? Or will you be fine without it
Answer:	The rationale behind 15 ft... If your vent fan is 15 ft or more from your dryer then the lint coming from the dryer will be dry enough such that it will not stick to the vent fan blades and later create imbalance, increased load, and inefficiency. The lint needs to be fairly dry when it reaches the fan blades. If the fan is within 15 ft of the dryer the lint will still be damp and a lint trap will be needed. Get the fan at least 15 ft away from the dryer and no lint trap is needed. Note... If you do get a lint trap make sure you measure the dimensions. It may be deeper than your wall you plan to mount it in. If I remember right the lint trap is around 7 inches deep and many walls are not that deep.
Question:	I purchased 32 of these for a new apartment building. 10 of them run continuously. Does anyone know how to fix this or are they defective
Answer:	From memory, and I'm guessing here ... the switch diaphragm must be mounted vertically.The switch is activated by airflow throw the plastic tube (it's a clear tube on mine) that runs from the bottom of the fan housing up to the electrical components. Take that tube out of the housing and plug it (tape the end). Let it sit that way for 10-15 minutes and see if it still runs.If it still runs and never shuts off, you may have a defective switch.If it stops, your switch is probably good. I believe I remember that moving that tube further in/out of the housing can adjust the sensitivity. Meaning I think if you slide the tube into the housing further, the switch will activate more quickly/easily. If you pull the tube as far as it can go without taking it out completely makes it less sensitive.If you have some continuous source of airflow, obviously, the fan will blow all the time. But I thought the switch was set to stop at 10 minute intervals and never continuously run - not sure - I thought I remember this feature.

Product features

Fantech DBF 110 Dryer Booster Fan 4" Duct 167 CFM

Product Description

DBF 110 is a duct booster fan designed for boosting air on demand. The product is equipped with a pressure-sensing switch that activates the fan once positive pressure is sensed in the duct line. The switch shuts the fan off when the pressure in the duct’s normalized.The DBF 110 features a plastic leak-proof housing and a pressure-sensing switch. Suitable for 4” ductwork.

About Us

Fantech does much more than make fans. We are committed to making products that support healthy and comfortable indoor environments.

Our high-efficiency products ensure your loved ones breathe fresh, clean air from this moment to the next.

Because at Fantech, we're not just building fans, we're building solutions and opportunities for a healthier, safer tomorrow.

Product description

When the dryer exhaust has a long run to the vent it increases drying time as well as wear and tear on the dryer. The DryerJet has been tested on runs up to 50 feet of duct and up to four 90° bends. Testing was done by an independent lab at Florida International University. Click on picture for dimensional diagram. No wiring necessary, just plug it in! Fully Automatic Operation. Features the PS-35 Pressure Switch mounted on unit completely wired to the 10-foot line cord. Auto operation with adjustable pressure switch wired to a 10, 115 volt power cord. Ball bearing motor OUT of airstream. No lint on motor. Install next to dryer or anywhere in the line - Tested to CSA standard C22.2 113-M 1984.

• No wiring necessary, just plug it in! Fully Automatic Operation.
• Features the PS-35 Pressure Switch mounted on unit completely wired to the 10-foot line cord.
• Auto operation with adjustable pressure switch wired to a 10, 115 volt power cord.
• Ball bearing motor OUT of airstream. No lint on motor.
• Install next to dryer or anywhere in the line - Tested to CSA standard C22.2 113-M 1984

User questions & answers

Question:	Can this unit be installed in the attic
Answer:	I put mine in attic on wood floor Works fine. My attic is well vented and easy to access.
Question:	I'm still not getting the air flow I need. Can you increase the air flow
Answer:	If this isn't giving get you the airflow you need I'm not sure what will. How long is your run? Mine pushes the air close to 25 feet including 2 90 degree turns. Are you sure there isn't an obstruction in your dryer vent?
Question:	Is there a minimum distance from the dryer for installation
Answer:	I have this product as close to the dryer as possible with approx. 2 ft. of flex hose from dryer-to-booster and another 3-4 ft. of flex hose from booster-to-outside vent pipe. The outside vent is approx. 16 ft. from the booster outlet. It really seems to help assist the dryer and shorten the time for complete clothes drying. I recommend this product.
Question:	Is this booster approved by the International Building Code. Thanks, Lindy How can I get a confirmation in writing that it is approved
Answer:	I would not expect the International Building Code to apply such a product. It is a device that quite like dryer in that it plugs into the a normal electrical outlet and into the duct in the wall. It is not a change to the building structure.It is listed with CSA here: http://www.csagroup.org/ca/en/services/testing-and-certification/certified-product-listing/certficate/108270_0_000%257C3812-81

Product description

The Fantech dryer exhaust fans have been specially designed to solve the problems caused by long duct runs on clothes dryers. According to dryer manufacturers and some local building codes, exhaust fans should be added in the dryer duct run when the length of the duct exceeds 35 feet with no bends, 30 feet with one bend or 25 feet with two bends.

• Performance certified by HVI
• Pressure-sensing switch automatically turns on the fan
• LED indicator display panel
• Blower:160 cfm

User questions & answers

Question:	I would need to install this 3 feet away from the dryer, does anyone think this could work
Answer:	The instructions clearly state that you need to install the fan a minimum of 15 equivalent feet away from the dryer but you could place it 8 feet from the dryer but only if you install a secondary lint trap 4 feet from the dryer. The distances change based on the total length of vent pipe but all that information is in the instructions.
Question:	Does the LB2 turn off more consistently than the LB
Answer:	I don't know because I've never used the LB1. Sorry
Question:	What is the difference between lb1 and lb
Answer:	I looked on the Tjernlund website and they do not even list making/selling the LB1 model. I was able to find a spec sheet on it and from what I can tell they are the same. My guess is they changed something (maybe like the motor) and gave it a new model number LB2. I have the LB2 and it works great.
Question:	can i install this unit behind the dryer
Answer:	No. There's a chart that you have to use to calculate the distance from the dryer to the booster based on the total length of the duct work. See this link for installation instructions, the information you need is on page one. http://www.tjernlund.com/Tjernlund_LB2_Dryer_Duct_Booster_8504216.pdf

Product features

Tjernlund LB2 Meets New Building Codes

Guaranteed No Clog Residential Dryer Duct Booster Fan.

Boosts long or restrictive dryer duct runs up to 150 equivalent feet. Reduce drying times up to 60% in long or convoluted duct runs and save energy.

- Lint Blitzer blower wheel repels lint.

- Reduce lint build-up, a potential fire hazard.

- Permanently lubricated motor positioned out of air stream for maximum motor life.

- Save energy through reduced drying times.

- 5 year no clog, no maintenance guarantee.

- Easy installation, automatic operation.

The Lint Blitzer Ul-705 Listed Dryer Duct Booster Fan (Dedpv) Model Lb2

Dryer Duct Booster Saves significant energy - reduces drying times 50% or more. Reduces lint build-up, dust & fire hazards by maintaining proper velocity in duct runs up to 150 equivalent feet. Features the Lint Blitzer material handling wheel & 5 year no-clog guarantee. 50 watt motor is not exposed to heat, lint or moisture. Includes 115 VAC cord - automatic operation.

Clothes dryers are often installed in areas of homes where they cannot work effectively leading to long drying times, high energy use, and lint buildup in duct work. If a dryer’s exhaust duct run is over 25 equivalent feet* moist air cannot effectively exit the dryer and exhaust to the outside—bogging down the entire drying process.

If a dryer’s exhaust duct run is over 25 equivalent feet and the dryer is experiencing long drying time, your dryer may need a Dryer Duct Booster fan. The Dryer Duct Booster can also reduce the potential fire hazard associated with lint buildup.

Product description

Decrease drying times and eliminate dangerous lint build up in your dryer system. This Dryer Booster Fan helps boost the performance of clothes dryers by allowing the dryer to more effectively exhaust the moist air created during the drying process. Long or zig-zagging duct runs can hamper the dryer's ability to get rid of the moist air in the drum. This means you are drying your clothes with damp air and if lint that gets past the lint trap isn't properly exhausted completely out of the system it can build up and become a major fire hazard. Includes instructions, hardware packet and mounting bracket.

User questions & answers

Question:	Is this product UL 705 listed or have other certification
Answer:	Yes , This product meets UL705 DEDPV requirements. and complies with International Residential Code requirements and is made in USA.
Question:	Can it be mounted verticaly
Answer:	Yes
Question:	Dryer vent runs from back of dryer along tge floor behind washing machine about 4 ft then straight up 6ft through the ceiling into attic. Can I attan
Answer:	I had a carpenter install a T booster fan in my attic, as my dryer is located on an interior wall, with no access to exterior wall, so carpenter installed exhaust thru roof with big U shaped plastic pipe out. so far, no lint on shingles or problem with dryer overheating. carpenter installed on/off switch and timer switch above my dryer. I can set timer longer than I think it will take to dry load, and fan will cut off. I can turn booster fan off completely if I might think there was a problem with booster fan, but still be able to use the dryer until carpenter came to repair ?
Question:	Does it automatically come on with the dryer
Answer:	No it does not. It needs to be wire to 115vac thru one of three ways. 1) simplest is a on/off switch. But you need to remember to shut it off. 2) thru a timer switch which goes off automatically. 3) thru a current sensor (950-9351 ) this is the best way then DBF2 wiil go on off with dryer. But you definitly need electrician to install & hook it up. Good Luck , Frank

Product features

About Tjernlund Products

The inception of Tjernlund Products dates back to 1938 and since then, the company has evolved into one of the biggest providers of gas fired furnaces and custom packaged roof top heating & cooling equipment. The portfolio is rich with many landmark products. During the mid-50s, Auto Draft Inducers were developed to eliminate draft problems associated with short stacks on roof top units.

Other people within the heating industry soon saw the advantages of Tjernlund draft inducers and wholesale distribution of the Auto Draft Inducers began in 1957. Tjernlund Products was established as a separate company in 1973. The original manufacturing facility had 12 employees but today, the facility has expanded to 75,000 ft2 and Tjernlund has grown to over 50 employees.

The engineering and manufacturing departments feature the latest technology in 3D CAD design and CNC turret presses and brakes. Tjernlund Products is still largely, family owned and managed.

• DOUBLE FILTER DRYER VENT - Capture lint, dust, pet hair and more with the energy-efficient, cost-saving BetterVent Dryer Vent. With a stainless steel pre-filter screen and a polyester filter, this vent traps the finest dust particles. Perfect for renters and homeowners, this double filter system ensures a healthy indoor environment.
• NO WATER NEEDED & ENERGY EFFICIENT – Save time, energy, and money with this long-lasting dryer vent. The BetterVent patented double filter system has no water requirement, eliminating messy cleanups. Dry clothes faster and increase savings in colder months by returning warm dryer air into the room.
• SAFETY ALERT FEATURE - Don’t worry about forgetting to clean the screen or filter. The patent-pending Safety Vent Flap will automatically open to keep your dryer from overheating until maintenance is performed. Once your flap is calibrated correctly, it will only open when approximately 80% of the airflow is restricted. If you notice that your dryer is taking longer to dry your clothes, it is time to change the filter.
• COMPLETE VENT KIT – Everything you will need to install and use your BetterVent right away is provided. This kit includes instructions, mounting hardware, 4 calibration weights, and 2 polyester filters. The kit DOES NOT include the transition duct hose. Easily vacuum clean the filters for extended use. Compatible with electric dryers only.
• MADE IN USA – Sustainable and built to last, BetterVents are manufactured in the United States of America. Save your time and protect your home with BetterVent.

User questions & answers

Question:	Can this vent be placed behind the dryer? We have front load stackable, just curios if this should be on the side or can go directly behind
Answer:	It has to be placed so air can flow through it. So I would say it is a function of how much room you have got behind. We actually have ours attached to the outside vent that is under our patio roof but we have a house. I don't know if that's possible in your case.
Question:	Are the filters washable/reusable? How much use are you getting before they need to be replaced
Answer:	I read the comments below... As I am getting ready to order new filters. I have had this system for approximately 3 months and even ordered a replacement package of filters when I purchased it. I appreciate the suggestions as I have found the filters need to be replaced more often than noted. I have found this system to work well my only complaint is with the filters. I do laundry for my husband and I ..so not what I consider to be a lot. If possible, I believe the screen used with the filter should be smaller allowing more of the lint to be trapped by it instead of the filter.
Question:	Does the unit need to be mounted on a wall or can it be laid on the top of the dryer
Answer:	Mine isn't mounted but it rather wedged between the dryer and the wall. Because it's waterless I believe you could lay it or possibly lean it if you wanted.
Question:	I just noticed that the box said for Electric Dryers. Does that mean it will not work with my Gas Dryer
Answer:	I am glad I read all these answers, they were very helpful. Now I know for my application this product will work great. I am installing a Gas Dryer on a back porch with an awning over it. The vent line is difficult to run cleanly away from the porch. I was concerned about all that lint, but I believe since I am exterior, no fume issues in an enclosed indoor space, this product should serve me well. Does anyone force any issues? Thanks

• HOUSEHOLD APPLICATIONS: Help to boost airflow in HVAC units to remove exhausts and odors from bathrooms & workshops and ventilate basements & attics, etc.
• UPGRADED ADVANTAGES: Superior balanced blades for long service life & quiet operation; Motor features a permanently lubricated bearing that operates quietly and requires no maintenance; Portable and lightweight; Sufficient 5.5' grounded power cord
• SPECS.: Diameter 4 inch, Speed 2930 RPM, Air Flow 100 CFM, Voltage 110/120V, Power 12W
• GROW ROOM APPLICATIONS: Used as intake fan to bring fresh air into grow rooms; Also used as exhaust fan in smaller setups with LEDs or Lights under 400W.
• NOTE: Max Operating Temp of Motor is 130℃ / 266℉; Max Ambient Temp is 60℃ / 140℉. If any other materials/particles get into the duct fan and get the blade stuck, users are to turn off the power immediately, clean it up, turn the power back on when handled properly.

User questions & answers

Question:	Can this be mounted vertically without harm to the motor or bearings? Answers from mfg or installation instructions only please. Thank you
Answer:	I don’t have the installation instructions anymore to reference sorry
Question:	Would this fan properly vent a 1000w hps lamp
Answer:	I am cooling two 600 W HPS lamps with a single fan and it works well
Question:	Can this fan be used to help with drafting on a wood stove? In line at top of chimney
Answer:	If you use it to move air into the stove pipe from an outside source, the fan can be outside with a duct that enters the stove pipe midway. This would act like a venturi to force air upward. Think about adding a 45 degree t to your pipe and using this fane to draw cold air from outside and forcing it upwards in the pipe. You don't waste warm air and you get a really stoked fire.
Question:	Can you hook up a speed control to this booster
Answer:	You can hook up a speed control but it does not work very good and was not designed for one. When you start cutting down the power, the fan struggles and eventually stops leaving a loud humming or buzzing sound which does not sound good for the fan and may pose a fire hazard. If you want a variable controlled fan, just buy a fan that has variable control. I made the mistake of buying variable control with this fan. I ended up buying another fan that I could use this variable control on and it is more powerful and much quieter.

Product features

VIVOSUN 4 Inch 100 CFM Inline Duct Booster Fan

VIVOSUN inline duct fan helps with ventilation issues. This duct booster fan is perfect for boosting airflow in long runs of ducting. Tight, precise construction eliminates rattling and reduces wear and tear to give the element a long life.

Features

Application Scenarios

Used as intake fan to bring fresh air into grow rooms; Also used as exhaust fan in smaller setups with LEDs or Lights under 400W.

Product description

Only DEDPV fan kit in the market: To run the full cycle of the dryer rather than resorting to periodic on/off cycling. That can be installed in any orientation with no calibration needed. That allows for flush mounted remote indicator. The DRM04 Dryer Booster Fan Kit is a Dryer Exhaust Duct Power Ventilator (DEDPV) designed for compliance to UL Standard 705. Any UL705 DEDPV is only suitable for residential electric clothes dryers employing 4” ductwork. Suncourt accepts no responsibility for use of this product in other applications. DRM04 Kit Contains: (x1) TFM04 4” corded metal centrifugal fan with monitor (x1) TFR100 remote operation indicator (x1) English and French TFR100 warning card (x35’) of 22 gauge 5-conductor wire (x1) CS100 clip-on clothes dryer current sensor with 6’ cord (x2) 4” metal cleanout sleeves with band clamps (x4) self-adhesive foam strips (to limit vibration transferred to ductwork) Screwpack Contents: (x4) 1/4” x 1 1/2” lag bolts (mounting the fan) (x4) 1/4” washers (mounting the fan) (x4) 3/8” rubber grommets (lag bolt vibration isolation) (x2) 6-32 x 1 1/2” machine screws (for mounting remote indicator to electrical box) (x2) #6 x 1 1/2” sheetmetal screws (for mounting remote indicator flush to drywall) (x2) #6 7/8” long wall anchors (for mounting remote indicator flush to drywall) (x3) self-adhesive cord clips (for securing low-voltage signal wiring) Tools / supplies you will need: 3/16” drill bit (wall anchors if remote is flush-mount, pilot holes for lag bolts). 7/16” socket and ratchet (to tighten lag bolts). Phillips screwdriver (for mounting remote indicator). Flathead screwdriver or 5/16” nut driver (for cleanout band clamps). Sheetmetal shears. Foil duct tape. Wire cutters (to cut slot in operation indicator if flush-mounted). Wire strippers (to cut low-voltage wire to length and strip if need

• SAVES ENERGY - Uses current sensors rather than pressure sensors, which increases efficiency and provides the fastest response time in the market. It is the only DEDPV fan on the market to synchronize its operation without periodic interruption, extra calibration cycles, or extended run-time.
• EASY TO INSTALL - This Dryer Vent Kit can be installed in ANY orientation and requires no calibration, which makes installation of this product easy and efficient.
• USA ASSEMBLED - This item is assembled and calibrated in the USA.
• DESIGNED FOR COMPLIANCE - UL705 DEDPV performance certified AND meets the IRC2015 building code. Note: Only approved for installation for electric clothes dryers and must be AT LEAST 25 equivalent feet for this kit to make the dryer operate more efficiently.
• ELECTRICAL BOX OR FLUSH-MOUNT OPTIONS - Is the only DEDPV fan kit with a remote indicator purpose-built for flush-mount or standard electrical box mounting.

User questions & answers

Question:	How loud is the fan
Answer:	Equal to a bath fan
Question:	Has anybody used this dryer booster with a gas dryer? I just bought this dryer and it has a CRITICAL WARNING in bold to use only with electric dryer
Answer:	All I can say is there is a reason they say ELECTRIC only.... that being said if you can install it as far as possible from the dryer... ie: where the vent goes out the roof... it would most likely not be a problem... but the device is NOT Intrinsically Safe so using it on a gas Dryer could be an issue. I have one on my Electric Dryer and it solved the issue with a long vent pipe run causing the dryer heat coil to shut down due to overheating...
Question:	My whole vent is done in 3" pvc. Could I put a 3" to 4" reducer on either side of this unit
Answer:	You can do that but it will reduce the air movement. They do make a 3 inch model, I would locate that model.
Question:	what is the air flow rate of this dryer booster
Answer:	The product description is 200 cfm fan....that is the air flow. I would suggest the buyer search the manufacturer's site for product installation instructions to get verify if the unit work in the particular situation. Ex: min or max distance from the dryer for the booster location, and airflow compared to the output of the dryer.

Product description

Dryer Booster Kit with FG 4XL Fan with Wall Mount Indicator Panel

User questions & answers

Question:	Has anybody found info on what a flashing indicator light means? It's nowhere in the documentation
Answer:	It's means that the fan it's running, nothing else .
Question:	The picture of this DBF4XLT looks different from the one in Fantech's website. Is this the old model
Answer:	No, looks like the unit I received.
Question:	How long is the wire for the indicator panel
Answer:	50 feet
Question:	It appears that it comes with a fantech fc4 mounting clamp. i would think you would need two of these? would it make installation easier with two
Answer:	No, the one mount works fine. No need for anything additional

Product description

Soler & Palau PV-100XPS Dryer Booster Fan offers the perfect solution to increase dryer efficiency. The PV-100X has been specifically designed to handle dryer boosting applications with a standard, fully enclosed motor with Class F insulation. S&P's dryer booster options will help you save on drying time, moisture build up, wear and tear on your dryer and your electrical bill. Soler & Palau offers a range of fans, dampers, controllers and ventilation accessories for various households, small office premises and restaurants to industrial applications. They commit to provide exceptional customer service and offer a range of ventilation products benefiting from over 60 years of experience within the industry.

From the Manufacturer

The PV100x has been specifically designed to handle dryer boosting applications when overcoming long or complicated duct runs. This system helps save on drying time, moisture build-up, wear and tear on your dryer, helps save on your electric bill.

• EFFICIENT DRYER BOOSTER: This kit includes PV-100X fan which is specifically designed to handle dryer boosting applications with a standard fully enclosed motor having Class F insulation.
• PRESSURE SENSOR: This dryer booster fan will be integrated with an air pressure sensing switch which has an electronic cycle timing board.
• STRESS-FREE SETUP: The included mounting bracket attaches to a support rafter or joist at the selected location. The centrifugal blade is designed to overcome extreme resistance for even the most challenging installations.
• KIT INCLUDES: This booster fan kit includes a PV-100X duct boosting fan (153 CFM), an integrated air pressure sensing switch with an electronic cycle timing board and a fan mounting bracket.
• RELIABLE AND CONSISTENT: With over 60 years of experience, Soler & Palau’s commendable and steady growth is due to their philosophy of developing air-moving products specifically tailored to their consumer’s needs.

User questions & answers

Question:	Can this be used close to the dryer
Answer:	If it’s installed within 15’ from the dryer if they install a secondary lint trap (LT-100) in between the fan and the dryer then we say it’s acceptable.
Question:	Does this product come with power cord
Answer:	Hello, Yes, this product comes with a 6’ long power chord. For any other questions, please reach out to us at 1-800-961-7370 or [email protected]. Chat with us live at www.solerpalau-usa.com. Thank you, S&P USA Team
Question:	what is the warranty
Answer:	5 years from the date of purchase for defective materials and workmanship
Question:	How may CFM does this fan move
Answer:	Don't know the exact rating. It definitely does a good job keeping up with my dryer so if used for that, it is a good match.

Product description

Centrifugal In-Line Duct Fans are designed for Residential, Commercial and Light Industrial applications. Backward Curved Centrifugal Impeller gives superior performance in High Air Resistance applications. Most Clothes Dryers are designed with Dryer Vent of approx. 15 feet. Exceeding that length decreases airflow resulting in Increased Energy Costs and Excessive Dryer Wear and Tear.

User questions & answers

Question:	why is it 2 speed
Answer:	Mine isn't.

Product description

The DBF 4XL features our FX4XL fan with a housing made from galvanized steel, suitable for most commercial applications | The fans can handle lengths of duct up to 60 feet and six elbows | The backward inclined blades allow lint to pass through the fan | The patented control automatically operates the booster fan whenever the dryer is running | When the dryer turns on, the fan is activated by the automatic pressure sensitive switch so warm, moist air is exhausted out of the house quickly | Suitable for dryer runs with up to a maximum 60 linear feet of 4" rigid duct with six elbows - Manufacturer: System air

User questions & answers

Question:	Can this be turned on manually
Answer:	No. It has a pressure switch that turns it on and off.
Question:	I installed the fan, and now it runs non stop. I tried a couple of things with sensor hose placement and it still just runs. Any ideas
Answer:	The fan does run much longer than you might anticipate, but it should shut off eventually. I have no installation tips or other ideas. It did work well for us, despite the long-running fan.
Question:	Can this be installed horizontally? We just put our washer/dryer in the garage and need to run the hose from the dryer 15 feet to the wall
Answer:	I installed mine about 10 feet from dryer. Horizontally. The vent continued on another 12 feet. Works great as long as you keep your lint filter very clean.
Question:	Can I use this right next to my dryer or does it have to be 15ft away
Answer:	Uuuuugly! This question appears to have come from one that doesn't want to get into a wall or attic. Will it work, I guess, will it do what it was intended right out of the dryer no, or not as well if manufacturers instructions were obeyed.

Product description

6" 240 CFM booster fan inline Duct vent blower with variable speed controller adjuster

• Specifications: Diameter: 6inch; Air flow: 240 CFM; Speed: 2950 RPM; Voltage: 110/120V; Wattage: 37W; Noise level: 48 db
• Controllable: Variable fan speed controller: it will correctly and precisely adjust the speed of your duct and inline fans
• Low noise: superior balanced blades for long service life & quiet operation; Motor features a permanently lubricated bearing that operates quietly
• Application: help boost airflow in HVAC (heating, ventilation, air conditioning) units to remove exhausts and odors from grow rooms, kitchens, bathrooms, workshops, basements, attics etc
• Package include: 1 pack 6inch booster fan, 1 pack variable fan speed controller

Product description

Versatile and durable the DBM4 exhaust/intake/booster fan features an enclosed motor and quality construction that allows low noise and extremely low power usage (18 Watts). this is an excellent choice for increasing air flow through 4 inch ducting. This fan contains a 110 cfm and comes with a 6 foot power cord.

• 18 watts
• Low noise and power usage
• 6 foot power cord
• Metal

User questions & answers

Question:	Can it be used ti exhaust carbon monoxide off a gas hot water heater
Answer:	You could but don't. Use the proper method of venting your water heater!
Question:	Could I use this in an outdoor fireplace
Answer:	The maximum air temperature this can handle is 150 degrees. It would not be recommended for a fireplace.
Question:	is it 110 volt
Answer:	Yes, it is.
Question:	What is the diameter around the center of the unit
Answer:	7" +/- .25". Very simple fan; you plug it in and it runs. I could not find an appropriate moisture sensor or pressure sensor to operate the unit, so I had the electrician install a switched receptacle that operates this booster fan when I turn on the bathroom fan.

Product features

Tjernlund DBM4 Duct Booster Fan

Flex or Metal Duct (100 CFM), 4".

Tjernlund EF-6 Duct Booster Fan

180 CFM, 6".

Tjernlund EF-8 Duct Booster Fan

300 CFM, 8".

Tjernlund EF-10 Duct Booster Fan

475 CFM, 10".

Tjernlund EF-12 Duct Booster Fan

800 CFM, 12".

Tjernlund EF-14 Duct Booster Fan

1200 CFM, 14".

Your best value for boosting air flow in ducts or powered air intake and exhaust

Heavy Gauge Housing, Stronger Motor.

Versatile Applications and High Temp Rating

Boost air flow in ducts or other applications.

Easy installation in both metal and flex duct

Crimped and beaded to fit smoothly with your existing ducting.