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Stack Effect
A.K.A. "Chimney Effect"
• Vertical air movement
up common pathways in
buildings -
Through elevator
shafts, stairwells, plumbing/
mechanical chases, etc.
• Can reverse downward
during warm seasons
Wind Loading
• Positive pressure
exerted on windward
side
• Negative pressure on
leeward side
• Can be more
substantial with higher
building leakage
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