AC Infinity CLOUDLINE T8, Quiet 8" Inline Duct Fan with Temperature Humidity Controller - Ventilation Exhaust Fan for Heating Cooling Booster, Grow Tents, Hydroponics

Do not cheap out on fans. Buy one of these. I've got a handful of cheap ebay fans in a pile in the garage and none come even remotely close to the cloudlines. You get what you pay for and these are an absolute testament to that. I've purchased 4 of the AC Infinity products now in varying sizes and every single product is a 10/10 including all the adapters/fittings they sell.

Es silencioso a bajo nivel, pero no extrae mucho el calor de la abitación!

Overall it is a great bit of technology, the smart features are invaluable. It is definitely NOT silent though. Past the 4th setting it begins being very noticeably "there" the higher you go (5-6-7-8-9-10) the louder it gets, until it just sounds like a jet engine. Make sure you don't have things laying around while you're testing it as it literally acts like a vacuum cleaner, will suck in your kid and your cat. Only buy this if it wont ever be running past 5th setting if you want quiet. Will work for small 4x4-5x5 spaces excellently. Another complaint is that on the pictures it is advertised with the controller 69, whereas I received the controller 67. The pictures are missleading.

It should have velcro pre filters that you can easily take off like other brands. Inwould even buy them as an option. We made a few from similar material. We have a mini split and pellet stove in our cabin. I use it to filter and blow either AC and heat depending on the season towards the back of our cabin. It would work great for shipping container shops or houses as well to move air to the back. I used home depot ducts and wire bullet looking mounts to hang the ducts for an exposed look. I do wish there was Alexa support for example I could say Alexa turn off the fan, Alexa turn up fan 2, Alexa turn off fan in 30 minutes. It has been a year since I installed it and it works just like Inthought it would. We wash the prefilters about once a month and you can def see all the dust it is cleaning from the air. Get the refillable filter version to change the charcoal down the road. I put the filter in the living room and added the fan on the other side of the wall in our pantry so it was quiet in the living room. I added a hook to the ceiling to hold the rear of the filter. See pics.

I have installed this to help ventilate a Server Closet / Storage Closet. There's actually an HVAC return in the closet, however in the Spring and Fall months (now) the HVAC barely runs, and the servers need some extra help (there isn't dedicated cooling for the servers themselves. This helps circulate air between our closet and hallway. This unit I got to replace our original AC Infinity 6 Inch unit. For the time being I used an 8-inch to 6-inch reducer from AC Infinity to continue to use our 6 inch line. I imagine there is some slight performance reduction here, and there is some backdraft when the fan is maxed out (not going to use it this way). "Cons" - A couple observations so far: the original DC-based controller is soo much better than the new "Grow Tent" oriented controller that this came with. The Auto Function takes some tweaking, and while the fan does "ramp" up when it hits a trigger temperature, there's no ramp up before it hits the target temp - so the sensor HAS to hit your set temperature before than fan starts to ramp up. This is very different from our older T6 model that had a "Smart" fan control that would aim to maintain the desired temperature and ramp up the fan while the temp increased to the target. - Another annoyance with the controller is how the mount has been switched around. With the old controller, I simply cut out a whole in the wall and this fit right in. The new controller is surface mounted, and the wires come out the bottom. Now I have a large hole in the wall that I can't full cover up with the new controller because I need the cables to be plugged in. It would be nice if they figured out a way to make the controller reversible - give you a second faceplate that allows you to inset the controller in a wall or cabinet. "Pros" - This thing can move air. Obviously, a bigger fan will move more air. - The noise level is different. The factory rated noise specs are recorded at the lowest setting, but even stepping up the speed to 5 or 6, it still remains around 50-60 decibels (low enough to hold a conversation next to it). One thing I noticed is that the air itself makes more noise. This could be in part because I'm using a 6-inch duct for this 8-inch fan. - Another Pro is that the actual Motor Noise is much quieter. With the T6 line, I notice the motor would whine when it would ramp up, and was rather noticeable in other rooms when over half speed. With the T8, the motor noise is much less noticeable, and all you really hear is the noise of the air itself. This also means less vibration that you hear in the wall. I can have this thing cranked all the way up and next door it just sounds like the HVAC unit is on. Other Notes: - As some other folks pointed out, the fan is not actually a "DC" fan. From what I can gather (after taking it apart), is this is a high-frequency PWM AC fan - as the voltage readout on the fan connectors was all over the place. - Another thing I noticed (this is a pro for me) is that the 120volt AC line plugs right into the fan - the cable is actually hardwired into the unit itself - about an 8 foot cord. This means there's no bulky power brick to find a place for. - I have this hooked up to a UPS, so I can monitor power usage. At max it seems to draw around 160-170 watts.