Home Heat Loss
& Heat Gain
-
Heat
loss or gain is measured & calculated in terms of Btu per hour needed
to maintain comfort
-Building heat transfer is calculated using both the U-factor and SHGC to
yield values in Btu/hr
-Heat gain calc is needed select the correct air conditioner
& heat loss calc to select correct furnace
-
Window
Solar Heat Gain dominates AC loads
-Low solar Low-E Glass cuts solar heat gain in half
-Low-E glass also insulates better to cut heat transfer year round day and
night