The ones for a tenner or the likes, essentially non variac controllers, how low does the speed have to go before the fans start to get noisy? 30%, 60% 90%?
I'm asking as I need my fan (6" single speed) to be as quiet as possible and as it's a loft grow regulating temps is going to take some doing.
In my mind I have an idea for a two or three stage system for my exhaust fan, full whack, 60% and 30% maybe, or whatever speeds work best. I want build/buy a variac controller for the low speed and use a cheap controller for medium speed if they are suitable. If not then doubling up on the variacs would be the next option.
So how noisy are they in reality?
Bookmarks