 鲜花( 1181)  鸡蛋( 48)
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what is R factor? how do you have UV on the windows?) i7 w6 J s% L
ChiaPet 发表于 2011-2-18 08:53 
, h0 {" N% W, d4 G' g$ u; l3 eR factor is used to determine insulation capability.$ ^! B+ z8 ^# v3 N
! `9 O9 J8 H! ~7 z4 KHere 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.% F* z8 H% \+ }
- e B) m) s1 U4 J, L, Y5 r9 gHowever, 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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