Originally Posted by Cheechako
Those type of fans are always noisy. new or old. Never heard one that wasn't. I like the rheastat idea to find the least noisy RPM
One way to make them more quiet is to mount them far away from the galley
, and use as low RPM
and large blade fan as possible. Smaller size means smaller blades means more RPM for the same volume of circulation, equals more noise
. Don't forget also that there will be noise
in the ducting proportional to the speed of the air in there, so you want the largest duct you can manage.
Our galley exhaust
blower is in the lazarette with the engine
room blowers, and sucks through a long large diameter duct, and it's not too noisy. It exhausts out the transom together with the engine
I realize this exact set up is not an option with a cat, but maybe there is some way you can route
the duct to get the blower away from your space.
Whatever you do, feel lucky you have one at all
This device is not all that common in my experience, and is worth its weight in gold, even if it's noisy