 鲜花( 1181)  鸡蛋( 48)
|
what is R factor? how do you have UV on the windows?
! u4 l! k7 s. ~- SChiaPet 发表于 2011-2-18 08:53  , s) `4 u9 d- Z( v
R factor is used to determine insulation capability.
- \$ D/ C9 `: A5 q
T: v; k" [1 B2 }, e8 M, ~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.
0 b% q8 ]+ e& [8 l% ], O, e1 m) }( i6 S' E& ~+ N
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. |
|