what is R factor? how do you have UV on the windows?0 d& u: z/ C$ `4 A
ChiaPet 发表于 2011-2-18 08:53
7 y p& q. u0 P! HR factor is used to determine insulation capability. 3 A9 Q4 L! w+ c! c6 @( u: b9 o( T' v" \* W0 z y- n% @6 h
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. ! m' P! v B. a( v1 Y) _ , w+ p7 O% f R' ?. V) E) U% dHowever, 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.
本帖最后由 ChiaPet 于 2011-2-18 09:12 编辑 ; |6 J! ^, @) s) i" a: |: g0 U( E L
R factor is used to determine insulation capability.5 z y1 g2 p& s: [. s
5 K2 E' [0 F' j, M( UHere 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.* N, z' e+ q0 O: p
... " x1 G& _, Z8 A' u7 g) Z$ h, R小黄 发表于 2011-2-18 09:06
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Thank you for your reply. But would sun-stop coating cost too much?
would sun-stop coating cost too much?- p" T4 Y7 d9 u0 `. D
ChiaPet 发表于 2011-2-18 09:09
3 ^' z3 C' X- I6 U0 n7 O) k- MAsk your builder to give you an exact quote.3 V* A9 ]9 @# r
You don't have to upgrade all the windows. Only the important ones.
Ask your builder to give you an exact quote.: s# y* h g+ v1 Y- G Q/ o" w
You don't have to upgrade all the windows. Only the important ones. 8 \: Q; u# p, J' _- r. l/ _* u小黄 发表于 2011-2-18 09:13
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Will do. Thank you.