Aygrochy 6 inch Quiet Inline Duct Fan with Variable Speed Controller - Ventilation Exhaust Fan Using for Heating Cooling Booster, Grow Tents, Hydroponics,Home use Ventilation and Exhaust Blower.

The fan comes with a controller and a plug in temp sensor. Power goes to the fan via the 3 pin plug then the controller can be placed approx 2 mtrs away and the temp sensor another 1.5 mtrs if needed.The fan has 10 speeds and the controller ramps up the speed in steps so keeps the current draw low. The ‘auto’ setting wasn’t quite as automatic as I’d hoped as in it won’t vary the fan speed to suit the temperature set point. Instead you pre-select the desired speed setting and the controller turns the fan on/off according to the temp or humidity set points. You can give it maximum and minimum set points to run the fan within so it’s quite flexible, will take a bit of trial and error playing with the settings but it will make sense (note you have to put a value against each one of the high/low temp and high/low humidity before the controller is ready to take over (those parameters flash at you indicating they need attention) I am not tech savvy but managed it fine.The fan itself is well put together and can be easily split away from the casing and withdrawn without disturbing the ducting either side. Fan is quiet and doesn’t vibrate at all, on speed 10 the air noise is more pronounced.

Very good value, simple to set up and easy to use

The product broke after 6 months of use several days a week for several hours at a time to extract fumes from my laser. I have ordered another of the same but can find no way of contacting the supplier to resolve this issue. Worked well when it worked. The new model is much quieter and more refined then the previous. Thank you for quickly responding.

The fan and controller are good quality and the fan is well balanced. The only problem I have (which is a fairly big problem) is that at slower speeds (below half) it emits a very loud hight pitched whistle that makes it unusable to have on at night.Edit* The high pitched whistle was the alarm letting me know the temp probe wasn't connected! Once connected it was completely silent and worked brilliantly. Uprated to 5*

We tried this with no other noise in a cellar at night in the countryside which is as close to silent as you get. It sounds like a jet engine. You can hear it two floors up. You can see that on the photos. Both watches measure the same. It is a fan and seems to work as a fan. But it is absolutely not quiet in any way! Returning as NOT as advertised. Well over 100db not 32db as advertised. Waste of my time.

Used to extract my laser cutter, placed on a WiFi plug. Great product

Very good design. Easy to connect into a separate control signal, and can be double headed for long air ducts from downstairs to upstairs. Quietly pumps warm air around the house to keep me nice and warm. I went back and bought five of them, so definitely impressed with the quality.

Bought the 6" model and generally pleased. It is noisier than hoped buti have mine suspended from the bracket rather than mounted to something solid which mitigates noise a bit.Even at low speeds it is moving plenty of air.Speed control is a little slow to respond but works well. Would be nicer if it gave rough rpm levels. Lead to the speed control is a stingy 1.5m.Power lead also stingy at 1m.