6 Inch Inline Duct Fan 240 CFM, HVAC Exhaust Ventilation Fan with Low Noise for Basements, Bathrooms, Kitchens and Attics, Silver

I purchased the 4 inch in this model as well. Customer service has been fast to work on issues. My first had to replaced, I reordered the 4 inch again. It works nice, is fairly quiet. Everyone says 4" is perfect for the 4 tier greenhouse. Maybe for plants but not for mushrooms. I ordered this one, the 6" with nearly double the CFM and THAT is perfect for the mushrooms. It is a bit noisier, but eventually I will be able to tune it out. It works perfect and gives me the negative pressure I needed. I put mine to timer, on for 10 seconds, off for an hour, what an improvement in growth! Will definitely get another for back up lol

I bought these to blow air up through new vents that I installed over my wood stove in the basement. The basement would get way too warm and the upstairs was too cold. I cut new vents through the floor and installed new duct work with these fans just before the floor vent. They blow so much warm air upstairs it is unbelievable. My only complaint is that they are a little loud but my main floor is now a comfy 70 degrees F and my basement is still a cozy 75 F. Would definitely buy again.

I use 3 of these in my heating ducts to help move air over long runs. First, the install was fairly simple (though I had to cut the wires for hard wire install, not plugging them in). The plug allowed me to test each fan before install, which was nice. The crimped end was not really crimped much. The wavy look was deceiving, I had to bend them in slightly. When I checked with a 6" duct, they were identical, until I bent them in. Finally, the fans themselves are not too noisy. However, when you consider moving air at a higher volume down a long run of 6" ducting, it sounds like a turbo in a big truck. They are pretty noise from that aspect. Just be aware.

I use this to extract heat from a portable A/C unit. I needed a fan with metallic blades due to heat. The heat it is exposed to will warp plastic fan blades. I was worried about the fan motor’s exposure to heat as well. This fan (in my application) is exposed to 145 degree internal duct heat for hours at a time which is right at the end of the motor’s advertised tolerance. It has been working without issues for over two months in Florida weather. I run it for as long as 6 hours straight, as needed. I use this fan to extract exhaust heat from a portable 9000 BTU A/C unit in my garage. This unit may also have use in a hurricane aftermath scenario (as in cooling a tent erected inside the house for sleeping (powered by a gas generator located OUTSIDE), if the power is out for weeks. This fan is hard mounted to a plate which I fabricated which seals the window opening completely. It can be removed from the window in less than 30 seconds. It also locks the window to help avoid entry from outside. I insulated the original flex duct with commercial grade insulation material used for A/C ducts in attics. The portable A/C unit is connected to the insulated duct, and then to this fan assembly at the window plate on the other end. The straight 4 foot duct run has two 45° elbows... this fan creates a vacuum in the duct to draw the heat outside better than the A/C u it could before. These portable A/C units are completely useless unless you facilitate the extraction of the heated air they produce. The uninsulated plastic exhaust ductwork they come with simply transfers all the heat the create right back into the room before it gets outside. It’s so hot in fact, it melts and distorts the window mount that comes with the A/C unit, allowing the heated air to literally blow back into the space you are trying to cool! It would heat and cool the garage simultaneously. Incredibly stupid and costly. To remedy, I insulated the exhaust duct from the A/C unit all the way up the the fan (at the window plate) in order to keep the heat in the duct, and not let it radiate back into the garage airspace. This fan sucks the hot air out. The window/fan mounting plate is made of 3/8 finish grade plywood, and painted with a two part epoxy, as to be waterproof and look nice. The fan is mounted to the plywood with a metal ring I fabricated using rivets, and it seals with a gasket. Control of the fan is manual, via the same power strip that supplies the A/C unit. The sound level is lower than the A/C unit’s noise output. The result: My garage can now reach 78°, with a 50% humidity level on a July day like today. Without the AC, the garage is 85% humidity, and 95°F.

Works good, but there is no black-flow preventer. Not a problem though.

Installed in-line on a 6-inch HVAC duct to increase airflow to the second floor due to too cold in winter/too hot in summer issues. Pros: super easy to install- 45 minutes or less if you’re handy- longer if in a tight or confined space. Very inexpensive fix if you have an upstairs that is too hot/too cold due to poor HVAC volume on upper floors. Cons: it’s really very noisy. If you’re ducting it to a bedroom, use a quieter model with a plastic body- all the sound carries through the ducts. If you plan to install yourself, buy yourself BOTH left AND right handed tin-snips to cut out the duct work you plan to install it in. Note you can also cut into ductwork with a utility knife, though only recommended for initial cut. Connect the ends with flashing tape to make things easy. I bought the Vivosun black plastic model with red fan blade to duct to all the upstairs bedrooms (4) and now it’s like an icebox up there in the summer. Running our central air no more than before we’ve managed lower the upstairs temperatures by 10 degrees easily- making it so much easier to sleep. I was originally going to upgrade the central air, but that was a multi thousand dollar change – this was in much better solution. Note- install these as close to the blower as possible- ideally right off the trunk line. Also HIGHLY RECOMMENDED- buy and connect to smart plugs that you can control via app or google home/Alexa. That will allow you to easily turn on and off without having to go to the basement every time you want to turn them on/off.

So far so good, my last one died within 6 months (other brand) so hopefully this one lasts! Does not come with clamps fyi

Perfect fan for my garage ventilation install. Just needed to give the one end a tweak to fit 6" duct over it, the other a 6" union solved it. The only noise I hear with an attic install is the whoosh of air from the ceiling.

Hace ruidoo

This fan is good and removes enough air for my 3x3x6 tent, enough to give me some negative air pressure when tent is closed up. Have not noticed any grinding noise from the fan as some have reported yet. For longevity of the fan it's best to mount horizontally and not at an angle as this could cause some uneven wear on the motor. The fan was loud before hooking up a long enough duct which has silenced it considerably(sounds like a bathroom fan on low). This fan is great for the money and if you do not need to run carbon filter or speed controllers.

I ordered two of these for air exchanger motors inline to the already installed ducting in my house. The replacement motors were $250 each so I ordered these to put inline to draw the air from the existing setup through the air exchanger system. I removed the old damaged motors and cleaned the air exchanger as normal, then mated the inline fans with the Growneer variable speed controller to the ducting. I have the variable speed to control seasonal or heavy humidity use and this setup works perfectly plus is no louder than the original setup. These fans draw the air as well as the originals and I can adjust them accordingly with the Growneer It allowed me to fix the system at a fraction of the price and even if I have a fan failure, I can replace it easily for pennies to the dollar of the original motors. They are even far easier to get at. For the price, it's worth the experiment for durability, I can always buy more heavier duty fans if needed but right now, things are looking, and working, very, very well. Super pleased!

Blows the air pretty good but is loud AF in my shop. Low noise is a complete lie.