If noise is of serious concern make sure you do not make any reductions in the exhaust, in fact if you can start expanding the size of the exhaust as soon as it leaves the fan. This way you are actually lessening the restriction and giving the air more room to disperse and not less thus creating less pressure. More pressure and restriction mean more noise. What about splitting off the exhaust to two locations instead of one if possible.

Tryna
trynagethigh Reviewed by trynagethigh on . air noise question I'm in the process of moving my growroom. We have a good location for the new one, the only problem is the proximity of a couple of open windows (on warm days) about 30 feet from the growroom. My question is concerning exhaust air noise. I'm going to be using a 1500 cfm fan to exhaust warm air through a window opening. The actual window frame itself is going to be boarded up and I'm making a wood box to surround the open window portion. The wood box will have a 12 inch hole cut in it to mount Rating: 5