Automatic Booster Duct Fan 4" Inline Fan with Pressure Switch

Absolutely amazing product. I am a mechanical contractor for commercial application which this item is cheap, quiet, easy to install. Overall amazing in getting the moist air out of the bathroom if your vent is undersized or a long run.

Great idea to add one of these if ur vent is pushing out from 8ft or more. turns on when senses air flow from switching on your vent fan or dryer- then it automatically turns off to sense if theres still something runnin. If no airflow- she turns off.

I used this for our electric dryer. We have about fifteen feet of vent pipe that runs through the crawlspace, and we had trouble with it plugging up and the clothes not drying. I put it two thirds of the way and it has made a huge difference. It has cut the drying time in half. How long will it last? I have no idea, but it's quiet and pushes the air.

Three-stars because, when the fan is on, it pushes air through the ducts like it is supposed to. However, the air pressure is way to sensitive, as it will kick on constantly, even when the HVAC system is not on. I went to customer service and they gave me the runaround - if there were additional ratings for the customer service, I would give them a one-star. I'm sure it would be a 5-star product had I received a good unit that worked like it was supposed to, as I believe this one slipped by quality control. Noise level seems to be high as well, as it is in our attic crawl space and I can hear it through the ceiling/walls and that is how I know it's running when the A/C or Heat isn't running.

I have a large house that has a very long dryer vent line. I didn't realize this until I burned out two heating elements in the dryer and then finally figured out that it was because the dryer vent line was so long. I put in this blower which turns on and off automatically and I could not be happier with it. I would recommend this to anybody that has a dryer vent line longer than 6 to 8 ft.

The ultimate easy to install and final solution to move hot air out of a long exhaust dryer duct.

Pricey but worth it. Installed in dryer vent line. While it is designed to run when no air is present, it seems to do this excessively.

Works great. Set on speed 2. Master bedroom now same temperature as the rest of the house. Room was always hotter by about 2-3 degrees during the summer. Super quiet. Fan settings remain the same if power outage occurs and then power returns. I bought the home depot ferncos. Should have gotten this a few years back. Easy installation.

Triggers reliably, relatively quiet. I'm using this as a make up air unit for my laundry room. I put the pitot tube on my dryer, while the fan is just behind a damper on an intake duct. Because of the intended use as a booster, this is programmed to shut off for a bit every five minutes to see if there is still flow with the motor off. For my use I wish there was a mode that doesn't need to shut off to sense, as the fan is on a different duct. This is still a very affordable universal make up air unit.

It works! Used to boost airflow to far end of house from a concealed duct heat pump. The automatic pressure detect works perfectly. I can even set my heat pump to 1% fan speed and the unit still detects the pressure difference and turns on! Glad i found it. Seems like a better option than the floor register boosters.

AUTO works but not when the unit is in up position. I had to tern it sideway a bit at about 45 degrees angle. In this position AUTO works well.

Très bon produit et facile à installer.

I bought this based on reviews, of other LG clothes dryer owners, saying it was the solution for dryer error codes if the vent pipe was too long (mine is >30 feet). Yes, now the dryer is happy, with the booster nicely pushing air, but 1) It was a pain to install as you must take it apart. In my case, the control panel is upside down after a common left to right install in a horizontal pipe in the basement ceiling below the main floor laundry room. 2) It worked perfectly for a month, starting when the dryer started, and turning off when dryer finished, like it is supposed to. Then it started sometimes turning on randomly, when the dryer was not even going. I installed a smart plug, so I can now use Alexa to turn it on when I want to use the dryer. This works so far as the booster, fortunately, holds the fan speed, and "on" setting, when its power is cut off.