09 Jan '18, 8pm

GBA: Quantitative Look at Solar Heat Gain

Designing south-facing roof overhangs by Robert Opaluch Malcolm, First, thanks for sharing your many helpful comments and ideas on GBA articles on Q&A. Many of us benefit significantly from each other's experiences and insights. I think that the key design criteria for passive solar involves locating and sizing windows, thermal mass, and doing sufficient insulating and air-sealing so that only solar heat gain can provide most of the home's wintertime space heating, yet avoid summertime overheating. For south-facing windows, designing overhangs to maximize mid-winter solar gains yet reduce summertime solar gains is useful, but more of a detail than a major contribution to passive solar heat gain management. I know some others disagree with this perspective. Shading analysis of the building site's landscaping and adjacent buildings is critically important. A passive solar bu...

Full article: http://www.greenbuildingadvisor.com/blogs/dept/guest-blog...

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