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Jimmery
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Posts:25
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| 08/07/2009 9:40 AM |
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Yes, it's certainly nice if you can keep things simple.
I've done some research and gathered a few contenders for a good dual pane window for cold climates, especially for passive solar purposes.
There's a new glass made by Guardian: called ClimaGuard 75/68 HER that has 75% light transmittance and 0.68 SHGC, and the U-factor is 0.28 with argon. The soft-coat low-E coating is on surface 3 (best for the heating climates of Canada). You could put this on all sides of the house.
Another interesting glass is the Pilkington Energy Advantage (noted in another post above) that has a SHGC of 0.70, and U-factor of 0.29 with argon fill. I couldn't find the data for light transmittance... This is a hardcoat prodcut.
Cardinal has the low-E 178 glass that is a soft coat high solar gain product, but is still put on surface 3. It has 0.78 visible light transmittance, 0.63 SHGC, and U-factor of 0.27 with argon.
ACG makes the Comfort E2 glass that is hard coat on surface 3. SHGC 0.73, U-factor 0.30 with argon, visible light transmittance 76%.
Getting a vinyl window casing filled with foam is also good. I'm not sure if going triple pane is a good idea--I guess you would have to compare the numbers with the ones above. Now I've got to phone around and see if the local window suppliers can make windows with one of these glass products. |
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Oberon
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Posts:25
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| 08/09/2009 8:47 PM |
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Jimmery,
Good information.
One quick follow-up, Cardinal has replaced LoE-178 with LoE-179.
LoE-179 has VT of 79%, SHGC of .70, and U factor of .28 with argon fill. |
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