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Question: Does a whole house fan cause problems with blown in cellulose insulation?

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.

Thanks.

Best answer:

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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3 Responses to Question: Does a whole house fan cause problems with blown in cellulose insulation?

  1. Poja K

    no it will not cause any big problem.

  2. papamoe

    I’ve had mine for thirty years and it hasn’t hurt a thing.

  3. Glenn B

    I would wait to see what happens first after installing the fan. Worst case scenario would be that you would have to put down some batts around the fan. But whatever you do, DO NOT put down any plastic to hold the cellulose down. Those who do install them may also have some ideas.

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