[power]

Hey guys, when you take all the time to insulate an attic but then have a large fan in the floor of the attic, how do you insulate that what do you do?

 

[jlsconstruction]

Spray foam above it

 

[tyb525]

Don't the HVAC guys frown on whole house fans, seeing how they suck in fresh air through the windows and all?

 

[TimelessQuality]

Whole house fan?

We usually make them hinge up so they can drop bats down on the louvers in the winter.. Good idea to add a switch up there so it can't be accidentally turned on in the winter.

 

[power]

Ok, it needs to be covered in the winter and then removed in late spring to create negative pressure.

 

[tyb525]

I've always seen a fiberglass batt layer on top of the louvers during the winter

 

[SLSTech]

They actually sell integrated insulated covers so there aren't any issues for forgetting to uncover it
I prefer foam boards to frame the sides & to top it off which allows for full depth of insulation & eliminate issues with not enough insulation above