what is R factor? how do you have UV on the windows?) S9 |$ A) @( \6 _4 G2 C9 ^9 ? P3 S
ChiaPet 发表于 2011-2-18 08:53
C! d4 i3 i; L2 eR factor is used to determine insulation capability. $ G- J3 _) u0 ?+ g + n, X4 A6 s2 e2 q6 ]9 n, ]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. ( U/ o9 S/ l- j( u1 V3 K& ], \4 n. U+ d
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.
本帖最后由 ChiaPet 于 2011-2-18 09:12 编辑 7 t7 D O4 I+ p! r: y e) Y, b% i
R factor is used to determine insulation capability. e" X* D( z1 y0 V
8 N5 }! p0 C" K$ rHere 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! ~3 {. [3 Z) c0 N) ~$ f ..." \, h: A/ Q5 ~% g+ P4 o
小黄 发表于 2011-2-18 09:06
/ u+ b8 d; s. E! \" ?: q5 Q, wThank you for your reply. But would sun-stop coating cost too much?
would sun-stop coating cost too much?0 {3 n3 C1 K. R+ L. w% J
ChiaPet 发表于 2011-2-18 09:09
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Ask your builder to give you an exact quote.' u) y8 P" l6 m9 V2 q
You don't have to upgrade all the windows. Only the important ones.
Ask your builder to give you an exact quote.4 ? `( y* m- h* `- s$ z
You don't have to upgrade all the windows. Only the important ones.! d0 |/ t; |: k( Z1 H+ e
小黄 发表于 2011-2-18 09:13
1#ChiaPet . C7 _$ A) F1 X" \3 y$ d. l, I. u5 q" ^7 F$ f
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个人比较喜欢东西向的房子,觉得阳光很好,而且冬天的时候省暖气 e! A: v$ R4 _- t0 w* T$ H
南北的房子,北面总是阴森森的,不舒服
我觉得不会,去年我买的新房装有空气换气系统,有三档,最低一挡是每20分钟就RUN一次,屋里温度夏天也是阴凉阴凉的,很舒服.BUILDER告诉我用最低档每月大概比不用增加$5,不管增加费用是不是这么低,总之我没发现比人家增加 .... h5 J, p E, \5 {& R2 g* M) U
amy-china 发表于 2011-2-18 16:09