AC Infinity CLOUDLINE PRO T8, Quiet 200mm Inline Duct Fan with Temperature Humidity VPD Controller, WiFi Integrated App Control Ventilation Exhaust Fan for Heating Cooling Grow Tent Hydroponic 8-Inch

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.

This is one of the most advanced fans I’ve ever had the pleasure of using, its energy efficiency is amazing. I use setting 1 most of the time. What else can I say If you read this just buy it you won’t regret it

Brilliant in every aspect, quiet, powerful, easy to use and install, lightweight and brilliant quality at a great price. Easily the best fan I’ve ever used (have 2 now)

Highly recommended I replaced a 10 inch fan with this 8 inch , it is So much better than my older one

The compactness of it 👍🏻

Nice

The product is really good. The only pain point is the accurate of the specs, cfm and db are not real. At 100% make much much much more noise than declare.

Don't buy this overrated product. Went faulty after 2 weeks ,manufacturer don't bother to reply to warranty email

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.

The best in the game, the wet dream of every passionate home grower. :)

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.

I absolutely love this system. AC Infinity makes controlling your grow so simple. The fan like all their products is of excellent quality. I have had mine for years and would buy another if I needed one.

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