Following up on the musty smell in our crawl space
Editor’s note: This is a follow-up to a previous thread on GBA. The previous thread was Why do I have a musty mildew type smell in my conditioned crawl space?
Yes we installed a dehumidifier not a humidifier. We had a guy check to see if there is moisture down there anyway and he says no. We have a gas furnace down there and a heat pump/ac unit. We had turned off the heat pump last year and just use the gas furnace b/c it’s cheaper heats very well. We were wondering if that is what caused the mildew smell. My Ac guy says no. He remeoved the expensive air filter that made our house smell worst.
We have installed the dehumidifier and he has shut off the vents that circulate air down there. So the smell has gone down quite a bit.
You had said to install a fan. Did you mean only one fan sucking air out? We have a vent on the first floor like a register from which the air flows down to the a/c etc I guess it is called an exchanger.
But the vents down in the crawl space are closed so we are not heating or cooling the crawl space any more.
Why should we install a fan? And where exactly? By cutting off the vents in the crawl space are we doing something wrong?
Thanks for answering we have been away and just got back.
GBA Detail Library
A collection of one thousand construction details organized by climate and house part