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not tech savvy but managed it fine.The fan itself is well put together and can be easily split away from the casing and withdrawn without disturbing the ducting either side.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.

I use it for a laser cutter as an extractor fan, and so far it works pretty well.Easy to access for the impellers to clean off the dust, very quiet, yet strong enough to eliminate all of the smoke.I can recommend this product if the extractor have to remain in the same room as the working area.The adjustable switch is a real plus.

This fan is great used as a bathroom extractor. I mounted it using some anti vibration pads in the loft and yes it makes a bit of noise when going full speed but it’s purely the movement of air, not the motor. Overall great product.The only thing I would say which I thought would improve the product is to have automatic fan speed increase with humidity increase.At the moment the controller operates on trigger points that you can adjust (e.g. fan turns on at xx percent when it reaches say 70 percent humidity).But it’s either on or off, yes the speed can be adjusted but only for all programs. It would have been good for it to work incrementally, e.g. 60 percent humidity brings the fan on at 30 percent say, and if the humidity of the room should further increase 70 percent then the fan speed increases to 50 percent speed and so on.If that was possible I would say this extractor was perfect. Still a fantastic product though.

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*

much much louder than the description describes. you wouldnt want to be in a room near this for any extended length of time.

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 this tan for my bathroom and it is 10 times more powerful and much quieter than the previous one. I’m actually going to turn the dial down as it’s too powerful but highly recommended

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.