Whole House Fan - Creative Ventilation Solution or Bad Idea?
I'm new to the forum so hello all...glad to be here. I recently purchased a 6,000 CFM whole house fan for a 1,500 square foot town house.
After doing some research), I realized I a 6,000 CFM fan need 1,152 square inches of Net Free Ventilation Area (NFVA) in the attic (i.e. 1,152 square inches of ventilation). I only have ~650 and, according to my HOA's rules, adding gable/roof vents is not an option.
To the Point:
I have a large spare bedroom that is not in use. It has two large closets and two windows. My plan is to increase my ventilation by installing one 256 square inch register in the ceiling of each of these closets.
Something like this:
When the fan is in use, I will open the windows in the spare bedroom and close the door, thereby transforming its windows into exhaust vents. When the fan is off, I will simply close the registers.
Would this be a good idea? Or should I just cut a big hole in the drywall separating my attic from my neighbor's and double my ventilation? (kidding! :laughing:)
And how will you seal them well enough in the winter? or don't you need heat in the area you live in.
Close the register (using built in lever) and cover Battic Door velcro-attached R8 Insulation. It's possible to cut this stuff to size with scissors.
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