25 Nov '16, 5pm

For GBA subscribers: "Cold Floors and Warm Ceilings" discusses ways to address temperature stratification problems.

For GBA subscribers: "Cold Floors and Warm Ceilings" discusses ways to address temperature stratification problems.

Air leaks coupled with the stack effect Also referred to as the chimney effect, this is one of three primary forces that drives air leakage in buildings. When warm air is in a column (such as a building), its buoyancy pulls colder air in low in buildings as the buoyant air exerts pressure to escape out the top. The pressure of stack effect is proportional to the height of the column of air and the temperature difference between the air in the column and ambient air. Stack effect is much stronger in cold climates during the heating season than in hot climates during the cooling season. . The most important factor in this type of stratification is air leakage. Holes near a home’s ceiling allow warm interior air to escape into the attic. As this air escapes, it pulls in cold exterior air through cracks near the floor — for example, cracks near the threshold of an exterior doo...

Full article: http://www.greenbuildingadvisor.com/articles/dept/musings...

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