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Laverne Dalgleish - Basic Air Barrier Requirements

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Building Science<br />

Stack Effect<br />

• In winter warm air rises and causes:<br />

• Exfiltration (positive pressure) at top<br />

• Infiltration (negative pressure) at bottom<br />

• In summer the air pressures are opposite:<br />

• Exfiltration (negative pressure) at top<br />

• Infiltration (positive pressure) at bottom

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