Under are the two products I bought for my develop tent. Just after acquiring two 6inch noise reducers that have been moldy, we endured the roaring fan all winter! Does everyone have a different way that does not make so significantly noise ?
VIVOSUN six Inch 440 CFM Inline Fan with Speed Controller, six Inch Carbon Filter and eight Feet of Ducting Combo for Develop Tent Ventilation Sold by: VIVOSUN Item query? Ask Seller Return window closed on Jan 31, 2019 $128.99
VIVOSUN six Inch Noise Reducer Silencer for Inline Duct Fan Sold by: VIVOSUN Item query? Ask Seller $44.99