AC Infinity CLOUDLINE PRO T4, Quiet 100mm Inline Duct Fan with Temperature Humidity VPD Controller, WiFi Integrated App Control Ventilation Exhaust Fan for Heating Cooling Grow Tent Hydroponic 4-Inch

This a super quite fan.The controller has a bluetooth smart phone App which works faultlessly.There is also a long power cord. The controller can power two fans simultaneously. Bought a cheaper fan first which was noisy & returned. The fan works best with hard plastic ducting as this carries virtually no sound compared to flexible ducting. On full speed the fan is barely audible.The only sound coming from the two intakes I have drawing air.I have the fan exhausting through an external wall duct which also reduces noise. Excellent fan, highly recommended.

Amazing product, and it arrives with the new Controller AI, not the one displayed in the picture, so just a heads up. It's the newer and better model and provides lots of amazing functionality, and also looks better. The fan is great at extracting air and keeping humidity low in my basement, and I love that I can check the stats on my phone and see how it has been performing. Also, being able to control it from anywhere in the world is very useful as long as you connect the controller to WiFi. Noise can be a bit loud on max airspeed, but that's expected. Anything below 7-8 is very workable. I'm setting it up as a dual system with a blast gate and splitter for humidity control, and also as an electronics fume extraction system, which is great for that purpose. Controller sticks onto magnetic surfaces so I did not need to mount it and put it on my metal garage shelving and placed the fan unit on the top shelf. It comes with very high-quality cables, and the packaging is also very well thought out; each thing is easy to find. There is endless functionality on the app, and you can customise and automate it through a variety of sensors and cases such as RH, temp, etc. Highly recommend it for anyone who wants a good quality and well-made inline fan that has all the features.

Ac infinity have the best products and this is no exception.... very quiet and efficient

Had heard a lot about these, and was almost tempted to import one from the US, so was pleasantly surprised when one popped up for sale in the UK. I kept my expectations in check, how silent can a duct fan be right? After a couple of weeks of use I'm happy to say I'm extremely impressed. It basically works exactly how I had hoped. The build quality is excellent, the packaging is excellent, and most importantly, the performance is there. At a setting of 2-3, which is all that's needed in a small environment, you can barely tell its on at all, which is just amazing. At higher settings you'll hear it but it's still very reasonable. I didn't expect to use the auto features on the controller that much but it's actually really nice for keeping the environment just where you want it. Overall can't recommend enough, acinfinity should definitely get more of these available in Europe as they are more than worth it.

For me the ac infinity fans were a game changer, got my environment dialled in just how I need it and with ease to, I purchased an s6 and a t4 reasonably priced I might add, they work perfectly together! These fans are great quality and I was even more pleased when they already came with a connector attached to a U.K. plug! Overall 10 out of 10 for these fans, hats off to AC infinity, they’re so quiet and just a quality product, I will never use another make again, if you’re thinking about buying one just do it, you will not be disappointed

Runs super quiet that's all I wanted from it

I use it as an extraction fan for a small office area. Various settings can are pre programmed and it's easy to use.

Excellent quiet, very quiet fan. Lovely bit of kit. But it's controller can be very dodgy and common problems with the humidity and temp controller run together, of it turning extract off if humidity low, both fans in fact, or start stopping, etc. So they released, hey presto, and NEW Fan Controller, because this one is pants. Get the S4 instead and an S6, or 2 s6Cloudlines if you have the room, and buy the new smart controller. Sorry I got the T4 but i needed a silent fan, so just run it dumb. There were no S4s as theyre as rare as rocking horse poo poo.