Wednesday, May 7, 2008

Glass Boxes in Hot Climates

"Don't expect comfort inside glass boxes in hot climates" are words from The ASHRAE Guide for Buildings in Hot and Humid Climates. Shading the roof and other badly oriented surfaces is imperative, but you have to address the fact that heat is rapidly entering the space due to the high thermal conductance of glass. The obvious recommendation is to increase the percentage of solid to glass surfaces.

But once you've blocked the direct solar, how much glass is still too much for conduction gains...

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