Question by Robert L: Does a whole house fan cause problems with blown in cellulose insulation?
I’m considering blown in cellulose insulation for my attic but I have a whole house fan (that’s the kind fan that blows the air from the house into the attic, mounted to the upstairs ceiling). Will turning on the fan cause the insulation to be blown around if I don’t hold it down with netting or the equivalent?
I’m hoping someone that has both the whole house fan and blown in cellulose can tell me how this works. Note that this is a powerful fan.
Answer by cheezyhill
It should not be a problem as long as you build a box around the fan to keep the cellulose away from the fan opening etc.
However cellulose is very lightweight and is blown in for the installation so you might have a few “settling problems” after it is installed.
You can always buy bats of insulation for the are immediately next to the fan if you have problems.
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