 鲜花( 1181)  鸡蛋( 48)
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what is R factor? how do you have UV on the windows?
: t0 P) x6 G: n, s* H1 _% kChiaPet 发表于 2011-2-18 08:53  2 \: b- u5 v6 @, t5 m
R factor is used to determine insulation capability.3 |3 X+ [* q6 [% d' A, a
, E* T. |4 u& w2 f. ^& XHere 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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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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