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what is the allowable leakage from a air tight room. 1

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hollandhvac

hollandhvac

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As the title already indicates, what is the allowable leakage for an air tight room?
 
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The air leakage rate must not exceed 2 L/s.m² 75 Pa (0.4 cfm/ sf 1.57 psf) when tested according to ASTM E779.
 
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