 鲜花( 1181)  鸡蛋( 48)
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what is R factor? how do you have UV on the windows?6 E) y! Y; m& C. D8 \
ChiaPet 发表于 2011-2-18 08:53  - V9 E: e& W5 N& n0 t S5 E3 o5 a
R factor is used to determine insulation capability.- A5 d, K6 r5 B/ A, @
" N" M# Z ?( D6 x9 x4 u1 }! cHere 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.
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; r. b. ^: W& C" p; u4 |# aHowever, 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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