AC InfinityCLOUDLINE PRO T8, Quiet 8” Inline Duct Fan with Temperature Humidity VPD Controller, WiFi Integrated App Control - Ventilation Exhaust Fan for Heating Cooling, Grow Tents, Hydroponics

UPDATE: July 2019 - This fan no longer comes with a "smart" controller, and now comes with a humidity controller. The biggest difference is that once it hits the set temperature it turns off (or on) completely. It does not vary speed with temperature. After purchasing a new unit last month I had to call AC INFINITY to order the old style controller, because I need the fan to always run at least at the lowest speed.FREAKING LOVE THIS FAN!! It is worth the extra money over a $60-120 fan. If you need things to be quiet,or need a smart variable fan (slower when lights are off, and faster when lights are on), than this will get the job done. It has 6 speed settings, with 1-5 being very quiet, and 6 being a little loud. Even though it is rated at a lower CFM than most other fans this size, the side by side hand test had me thinking this fan puts out 20-30% more air.In my specific example, I had a $80 fan 8" fan I bought a few month ago running just above its lowest speed (because of noise) and room temperature hovered about 88-90º with ambient temp of 80º. With this fan running at speed 4 or 5 during lights on.the room temperature hovered about 84-85º. The noise at this speed is at least half as loud as the old fan on its low speed, and temps are 5º cooler, WIN!Plus when lights are off the speed slows to 3 or 4 and I cannot even hear the fan any more. This is such a huge improvement for my indoor grow as lights off is during the day and I can no longer hear the fan.NOTE: The controller on this fan will not control 2 fans like on the 4" and 6" versions.

This is an excellent fan. I purchased it to be used as a window fan. Most window fans for the most part are wimpy in comparison to this monster. This will give you wind output from a calm breeze to near hurricane force. The volume level is not what is stated at 39 db. At a distance of 3 feet I measured the decibels at 75db on the highest setting of 10. That said, this was with no ducting attached attached. With ducting attached it dropped to 70db. I will likely be using the fan in the neighborhood of 4, which drops the sound level to about 57db. In my NYC apartment the ambient level clocks out a 54db just 3 db less. So in this respect the sound is very quiet from the fan. Another interesting factoid about this fan compared to others is that it has a plastic body as opposed to metal. Normally, I would say metal is better, however the quality of plastic is excellent and it is definitely quieter than the metal housing duct and ventilation fans that I have heard. I think because the plastic amplifies sound less than metal fan housings. It's also quite efficient, although if you run it on 10 you're going to be pushing about 150+ watts, again higher than specs, but it is quite forceful if you need this kind of output. I will likely never take it above 7 which is in the neighborhood of 75 watts. To keep the fan dry I created a plywood hood covered with plexiglass, angle brackets and silicone. It fits in my window with a hole cut out for the fan to fit through. I engineered the roof of the hood at 45% slope to keep water and snow from collecting, and I added screening from home depot for the intake below to keep insects out. In this respect I can use it all year, although it's doubtful I will in the heat of summer. I also love the fact that it has bluetooth operations from my phone, and they actually have real people in their customer service department that are quite helpful. Recommended for the best possible window fan, provided you are handy with creating a hood. Also, likely very good if you are a grower or want it to move air from one area of your home to another.

This is a great fan for tents and grow rooms up 10’x10’x6.5. It’s over kill for a 4’x4’x6.5’ but works superbly on fan speeds 1-4 without collapsing the ViperSpectra 4’x4’x6.5’ tent. Since I bought it I’m going to run two 4’x4’x6.5’ tents with the one fan and Filter. Andy from AC Infinity and I had a great talk on the phone about this idea. He confirmed that it will work due to the Hi CFM flow this 8” fan creates. Customer service is top notch! I won’t buy a fan from anyone else.The controller is very cool! It’s works as advertised and is made here in the States in California. It’s easy to figure out so don’t over think it. When installing the fan the directions say to use duct tape to help seal the filter to the fan. Duct tap is messy after it’s been on something for a while. I decided to use Black Electrical Tape. Four wraps around the flange where the filter connects and the same on ducting vent side. I think it makes a better seal than Duct Tape. It’s a clean look and won’t come off in pieces and chunks after sitting up in the heat for 16 weeks.

This fan is amazing and it came with the 69 pro controller love the automated settings great seller fast shipping it is worth every penny the controller alone is 100 bucks this really is a really good deal

I was having issues with one room in the house either being hot or cold, depending on the season. This device has fixed that problem. I installed it a few weeks ago and it is working great. The room is now one of the colder rooms in the house. If you are installing in the attic, like I did, make sure you go with the T series. The T series has a lot more automation and there's an app for it as well. No need to go up into the attic to change settings. HVAC guy wanted almost $2k to fix the problem. I am giving this 5 stars. Not just because of the device itself but for the great customer service I have received. The programing can be a little confusing. I had to called customer service twice. They walked me through how to program the device, just the way I wanted it. They were very helpful.