Presently, my two bathrooms have exhaust fans venting straight into
the roof attic space. I do not believe that my roof has any
ventilation system at all. I am concerned that this may promote
unhealthy air which filters down into the living areas below. Are
these concerns valid?
I am considering installing ducted versions of the exhausts fans which
exhaust air outside through the roof. Or I could install a draught
stopper version of the exhaust fan to prevent air from coming down
from the roof. I would also like to install some sort of roofing
ventilation like those twirling whirlybird ventilators. Would these
address the issues above?
I would vent the fans to the outside, not let them blow in the attic.
Venting attics is for cold climates, to stop ice dams. Other areas
need to be sealing the attics and keeping the heat out. We need to
change how we build.
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