The vertical movement of air due to differences in indoor-outdoor air density that increases the buoyancy of the indoor air relative to that of the outdoor air. This difference occurs as a result of differences in indoor-outdoor temperature. The buoyancy forces driving stack effect increase with building height and temperature difference. In cold c [..]

The tendency for warm air to rise in a space.

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

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 dis [..]

Air, as in a chimney, that moves upward because it is warmer than the ambient atmosphere.

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 dis [..]

Air, as in a chimney, that moves upward because it is warmer than the ambient atmosphere.

Air, as in a chimney, that moves upward because it is warmer than the ambient atmosphere.

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 d [..]

The overall upward movement of air inside a building that results from heated air rising and escaping through openings in the building envelope, thus causing indoor air pressure in the lower portions of a building to be lower than the pressure in the soil beneath or surrounding the building foundation.

Stack Effect is 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 [..]

Used air, as in a chimney or air duct, that moves upward because it is warmer than the surrounding atmosphere. In larger buildings the stack effect can overpower the mechanical system and disrupt norm [..]

The flow of air that results from warm air rising, creating a positive pressure area at the top of a building and a negative pressure area at the bottom of a building.

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 lo [..]

  Occurs when a building is heated, and the warm air inside the building is less dense than the colder air outside. The inside air rises up and out of any holes in the upper portions of the envelope. [..]