Stack Effect

Air movement caused by warmer air rising and colder air falling. This generates small but steady pressures in direct relation to the size of the temperature difference and the height of the column of air. The resulting pressure differences can lead to air leakage and generate unplanned air flows that result in indoor air quality problems within buildings.

Related resources: BSI-075: How Do Buildings Stack Up?, Air Leaks—How They Waste Energy and Rot HousesBSD-014: Air Flow Control in Buildings; BSD-110: HVAC in Multifamily Buildings