VIVOSUN 4 Inch 8 Feet Non-Insulated Flex Air Aluminum Ducting for HVAC Ventilation w/Two 4 Inch Stainless Steel Clamps

Funciona muy bien

The fan encasement is made from a duct-like material, but it is much stronger and more rigid. The fan has plenty of room inside the ducting should the encasing ever be dented or deform from mishandling or falling. When I received it, it would rumble loudly throughout the ducting; the issue had something to do with the seating of the fan blade, because I took it off and ran it and the motor itself was silent. I removed the fan blade, applied some oil, and pressed in the blade while tightening the nut which holds it on -- the rumble was reduced significantly. Overall, an excellent fan exhaust fan at a solid price. Any workshop, growery, or perhaps a smoking room could benefit from this addition greatly., especially with the addition of a carbon filter.

Installing was easy, worked well this winter to keep our kitchen warm,noise wasn’t an issue

Esperamos de mejor calidad, resistente y más potencia de extracción, pero lo califico como bueno!!!

Update after ten months: Still running strong, but now quite noisy. Will need to replace it because most and vibration are too much for a home. ~9-10 months of constant operation moving warm - hot air. (original review) Excellent value! Noise level quite modest once installed, handles 25' duct well. No issues after first month venting intermittent high temperature exhaust. Fan noise increased after the first few days, but still very reasonable. Don't want it in your bedroom, but totally acceptable in the next room.