AC InfinityAIRLIFT T14, Shutter Exhaust Fan 14" with WiFi Temperature Humidity Controller, EC-Motor Wall Mount Ventilation and Cooling for Sheds, Attics, Workshops, and Greenhouses

Innovative design, simple to install, love the phone app, customization features and expansion options. While I assume this system was originally designed for grow houses, I installed in my home attic to control temperature and humidity and its works reasonably well. The fan is lightweight and decent quality and reasonably priced. My only suggestion to the company is to allow for an external thermostat so that you measure the difference between internal and external temps (caveat being that you may already be able to do this and I am just not aware of this feature).

This works like a charm. Easy to operate and put in. My roof vents don’t work well because they covered the openings with felt. The attic would become boiling and cause the second floor to become so hot during the day. Installation was simple. Had to install a plug in the attic for the wire but other than that it was simple to set the high temp limit and watch it turn on when it hit the temp and then turn off when it reached below the limit. A must have for any attic space!

Built a cedar box to clear the blades when fully open and works great. Great quality and very cool features with easy programming. Barely pulls any electricity and with some vents keeps the attic flowing.

My attic has limited venting due to the roof design (thank you architect!), so I've had issues with mold up there. Bought this fan in the hopes of getting more control over the temperature and humidity. Too early to tell if it works for that purpose long-term. But so far so good. It was a cool night when I installed it so initial attic temp was 68F. Just in the time fiddling with programming it the temperature dropped to 64F. For those that complain the fan doesn't cool their attic (or any space for that matter) - make sure you have enough intake air venting, as well as size the fan for the volume of your space. Measure your space and calculate the cubic volume then look at the fan spec to see the CFM moved at high speed. Divide your space volume by the fan CFM and this will give you the number of minutes for the fan to completely exchange the air in your space. Aiming for 10 minutes or better will certainly move a lot of air. Only downside is that a straight temperature/humidity control really isn't helpful for venting a space you want to prevent condensation in. What is needed is a dual temperature probe - one that measures the temperature and humidity both inside and outside of the space you are trying to control. This way with a programmable controller you can set it up so that it only comes on when the difference between the two spaces rises above a set threshold. It's relative humidity you are trying to control. After all, an attic will be very damp on a rainy day, but that's because of the humid weather. Running the fan because of this humidity is pointless because it will just be drawing damp air in from outside. But running the fan once outside humidity levels drop would be beneficial. This isn't really a complaint with this fan, because all attic fans seem to lack this level of control.

Great fan. Does what it needs to do very well. Took me a week to figure out I needed to create an automation for the variable fan function. Basically fan turns on/off at 60 degrees. Every 5 degrees increased it'll step up in fan speed. So for example:[Degrees]59 = OFF60 = speed 165 = speed 270 = speed 375 = speed 4And so on to 10Very happy and ended up buying the house fan, carbon filter combo and a couple other items. All high quality.I originally got an inline for my laser a couple years ago that has been issue free

We have an operable skylight in the second floor ceiling with a screen, an ideal place to install a vent fan. The 14" was the largest that would fit. I built a mounting frame out of 2 x 3s with plexiglas panels to keep the air from backflowing where the fan didn't cover the skylight opening. The fan is tilted about 25 degrees up from horizontal (the roof slope). We use it at night when it gets hotter than 90 F outside during the previous day, are able to cool the house down to the low 60s in the morning. So far this summer have been able to avoid using the A/C, saving $$ on electricity. Our house is 1800 sq ft. The temperature control prevents it from over-cooling the house. The fan is in a room next to our bedroom, and we can hear it, but it's not an unpleasant sound (kind of white noise) and doesn't interfere with sleep. The display is easy to read, and the controls have a lot of options and are easy to use. We run it full speed, when speed gets 60% or lower the louvers don't open fully and can chatter. If the louvers had an actuator to open fully anytime the fan is on, it would make the speed control more useful. Also for installs in living areas where it will be seen, it would be better if it came in white. Highly recommended.

I don’t typically leave product reviews but I want to - especially for those using these to for greenhouses.I almost bought a cheaper manual or basic temp controlled fan, but after looking into the smart controller I figured I’d give it a shot. Once I started to configure the fan I saw options for temp, humidity, and VPD triggers. VPD is a function of temperature and humidity which is important for a healthy greenhouse environment. High VPD equates to high levels of respiration (making plants prone to burning from the sun and nutrients), low VPD is low respiration (putting plants at risk for root rot and pests).Even with a humidifier in a greenhouse high VPD is easy to run into during the day, but so is (obviously) heat. At night low VPD prevails where heat typically isn’t an issue. So by setting temp triggers during the day and VPD triggers at night, VPD continues to stay in acceptable range.The UI in the AC Infinity app is also intuitive and well-thought out. I am impressed!