AC InfinityCLOUDLINE PRO S12, Quiet 12” Inline Duct Fan with Speed Controller - EC Motor Ventilation Exhaust Fan for Heating Cooling Booster, Grow Tents, Hydroponics

This is my second one of these (12"). Not because the first one broke but because I had an additional project. They are relatively quiet and push a lot of air. One has been running an exhaust for my metal shop for over 3 years and still works flawlessly. The second is running a DIY air cleaning system that I put in my woodshop -- barely hear it in the attic and, again, pushes a ton of air. Recommend.

great only 1 month use

Added some ductwork in my house two years ago to help distribute the heat from the woodstove. This fan running 24/7, 6-7 months out ofthe year. Well worth the money compared to the units at H/D or Lowe's.

I purchased the 8spd setting basic model Cloudline 12in (not humidity controlled).Its a powerful beast.. Of course AC infinity's inline duct fans are as quiet as you can get for what they are.I needed a high static and cfm fan for my hood at my glasstorch table..It runs nearly 24/7 for months now at setting 3-4.. then setting 7 when working this way i maintainair current in building 1 direction further increasing safety of glass dust ect..Will be disassembling for a routine clean soon but honestly this thing has worked great for me.passed every smoke test and has maintained good pressure for quite awhile in a workshop environment.Meeting and exceeding my needs so far..Ive used ac infinity for many projects requiring airflow.. Hope their quality never changes causeso far they have a fanboy in me.. pun intended.. :D

This fan runs inconsistently; I'll leave it in and come back to find it not running. I reached out to the manufacturer and they tried to blame it on me bypassing their controls, in an attempt to get it running correctly. They said if I bought their 10 speed controller the fan would magically operate correctly. Guess what? No change. Now I replacing it with a more competent manufacturer...

Read: if you have a 12” supply line running it the upstairs of your home and the air conditioner just isn’t pushing the air to the registers, get this!!! Installed one in a 2700 sq ft two story home with the furnace in the basement, there is now measurable air reaching the entire top floor. And the best part is you cannot hear it from outside the utility/mechanical room, even when running at full power.

I have an old house built in 1940 and had a full renovation with the HVAC air handler installed in the attic. The problem was getting the hot air “heat” to flow down to the first floor of this two story house. Since we have an electric heat pump system, this solution works best. The air booster now forced the heat down to the first floor and the house is completely warm instead of hot upstairs and cold downstairs. A must for anyone having a cold downstairs problem.

These are good fans, and the controller is a nice feature. BUT the problem is that the inlet and outlet openings are NOT compatible with 12 inch duct work of any kind. I called their customer service and they acknowledged the issue but they do not offer a fix. The openings on both ends are closer to 12-1/4" and no 12" duct work or flexible ducts will fit over the outside. And the inside tapers in pretty quickly so you can't insert the duct there either. We had to make a custom solution - we bought some heavy duty rubber sheeting 1/8" thick by 3" wide by 3.5 ft long and used hose clamps around that. Be careful if you do this as many of the 12" hose clamps do not open up large enough to go over the rubber on top of these connections. The ones provided with the fans have extra length and will go over the rubber, but if you buy them separately they may not be big enough. Select them carefully.