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EFFECTIVE LEAKAGE AREAA parameter determined from blower door testing, giving a measure of the tightness of the house shell. Conceptually, this leakage area reflects the square inches of open area through the house shell, through which air can infiltrate or exfiltrate.
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EFFECTIVE LEAKAGE AREAELA. Calculation in square inches equal to the total area of all air leaks in a building envelope. Defined by Lawrence Berkeley National Laboratory, the ELA is the area of a nozzle-shaped hole that wo [..]
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