AIVC - Air Infiltration and Ventilation Centre

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air leakage

Laboratory space pressurization control systems.

Maintaining proper differential pressure in lab spaces is one of the most challenging tasks facing the environmental control engineer.

Field comparison of alternative techniques for measuring air distribution system leakage.

ASTM has recently standardized a methodology for measuring the leakage of residential air distribution systems to unconditioned zones. The standard includes two alternative leakage measurement techniques, one of which requires only a blower door, whereas the second technique requires a flowcapture hood as well as a blower door. This paper reports on the results of field measurements in 30 houses using both measurement techniques, and analyzes the relative strengths and weaknesses of the two techniques.