VIVOSUN4 Inch 203 CFM Duct Inline Fan with Variable Speed Controller

For indoors it is very loud. Would be better in a garage or separate room. Otherwise great value for the price. Would recommend.

Vivosun - where to begin.. spent over 700 dollars on there products. Had an issue with the 8 inch fan knocking noise. Vivosun refunded the money immediately after reporting the issue. Bought another one and works perfect. Company is top notch.. love all the products and will continue to purchase.Excellent customer service...

I got this fan for my 4'x4' grow tent (also a Vivosun purchase) and it is just amazing, perfect for my use. Then only a few months later it started knocking quite loudly, upon emailing Vivosun directly they issued me a full refund immediately so I could purchase another as it was the quickest way for me to get it.I will now buy all my items needed from Vivosun as you can't go wrong with a company that provides this level of service.

Product works as described. I used it in my basement to direct marijuana smoke outside through some 6" dryer tubing, which is merged into my dryer exhaust. This keeps my basement and house smoke/odour-free. I cannot predict how long it will last with marijuana smoke residue blowing through the fan blades etc, but for the money, it is well worth it.The fan is quiet itself, but with the fan mounted to a joist in the basement ceiling, the floor above it rumbles like crazy.There is a dial to adjust the fan speed.

En ligne pour répandre la chaleur du foyer partout dans la maison... très efficace.