June 15, 2009


The software CONTAM was used to create a calibrated multi-zone model to replicate in-field tracer gas decay measurements of a new two story, 2600 ft2 (240 m2), single-family house in Sacramento, CA under different whole-house dilution ventilation scenarios. The enclosure leakage distribution was adjusted to tune the model to the measured tracer gas concentration data. The calibrated model was then used to compare different ventilation systems under identical outdoor conditions over a one-day period. Results showed that ventilation systems that delivered air to all zones, either by a dedicated duct system or by incorporation of the central forced-air space conditioning system, had more uniform ventilation air distribution.