For Stack Effect we have terms and definitions in 4 topics. The topics are Air Quality, Boiler, Environment and Natural Gas.

Stack Effect (Air Quality)

The overall upward movement of air inside a building that results from heated air rising and escaping through openings in the building super structure, thus causing an indoor pressure level lower than that in the soil gas beneath or surrounding the building foundation.

Stack Effect (Boiler)

That portion of a pressure differential resulting from difference in elevation of the points of measurement.

Stack Effect (Environment)

Flow of air resulting from warm air rising, creating a positive pressure area at the top of a building and negative pressure area at the bottom. This effect can overpower the mechanical system and disrupt building ventilation and air circulation.

Stack Effect (Natural Gas)

The tendency of a heated gas to rise in a vertical passage as in a chimney, small enclosure, or stairwell.

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