 鲜花( 1181)  鸡蛋( 48)
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what is R factor? how do you have UV on the windows?
+ w( B7 {, K+ u) N; l' p: HChiaPet 发表于 2011-2-18 08:53 
" b8 c5 ~ G; N- W/ q0 B" [ O2 GR factor is used to determine insulation capability., e; K4 E. F0 ?+ Z0 N# Z. E: p7 f
! a) E1 {1 u! n2 M4 @Here 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., \+ f6 ^, Y3 J6 [* N
8 o# k0 Y0 j* r/ }However, 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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