 鲜花( 1181)  鸡蛋( 48)
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what is R factor? how do you have UV on the windows?
Z+ z- G# o) h. K( C! G* p/ ?ChiaPet 发表于 2011-2-18 08:53 
/ P1 \5 c: m2 B2 rR factor is used to determine insulation capability.
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, b7 f; x% h' o2 e3 sHere in Canada, walls are well over R20. So, even if the exterior walls are hot under sunlight, it won't really affect interior living space.% B" K% G, x$ ^6 b6 ]% a- _
, x+ T+ R3 X, _- p+ }# y( tHowever, windows have lower R factors and allow UV radiation (and radiation of other frequency) to enter the house. So, it's best to upgrade your windows, if radiation (i.e. sunlight) is a potential problem. Typically, you can upgrade your windows to triple pane, with sun-stop coatings on both sides. |
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