Methods of Measuring Ventilation Rates and Leakage of Houses

摘要

Two methods are described for measuring ventilation rates in houses. The decay method permits single measurements of ventilation rate very simply. The equilibrium concentration method requires a network of tubes for tracer gas distribution and sampling, but gives a continuous measurement. Both nitrous oxide and carbon dioxide have been used as tracer gases. Calibration procedures for the gas analyzers and flowmeters are described. A pressurization test is used for measuring house leakage, with a fan installed in an outside door. The calibration procedures are given for flow measurement and assessment of effective leakage area. The use of a smoke puffer to locate leaks is also discussed.