Window Ratings
From Zissil
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== Heat Loss and Heat Gain == | == Heat Loss and Heat Gain == | ||
− | + | The ratings for energy efficient windows concentrate on how the window gains or loses heat. This occurs in any of three different ways: | |
− | # Windows gain or lose heat through direct conduction through | + | # Windows gain or lose heat through direct conduction through the window's frame or glazing. |
# Windows gain or lose heat through the sun's radiation | # Windows gain or lose heat through the sun's radiation | ||
# Windows gain or lose heat through air leakage. | # Windows gain or lose heat through air leakage. | ||
− | + | The ratings measure and rate different these different elements. | |
=== Direct Conduction === | === Direct Conduction === |