The stuff I have read refers to area of attic. I have no idea of how or
when the volume of the attic applies. It seems a larger roof area
exposed to sun would take on more heat, but perhaps the higher peak
(more volume) offsets the rise in the interior temp. So, area of attic
floor .. a 50' by 30' attic floor is 1500 sq. feet of floor. The 1:300
formula gives 5 sq. ft. vent area for 1500 sq. feet of attic floor.
The "bonus room" is an add-on? Heat pump in attic? Does it ventilate
to outside? If not, it seems it would heat the attic .. our heat
pump/AC puts out an awful lot of heat in summer, to the outdoors.
We know volume can be measured in cubic feet. If you gave an estimate
of the height of the roof, that would indicate much more. When you
stand up in the attic, is the roof twice as high as you are tall? 1.5
times as high? 2.5 times. Are you about 6 feet?
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