Tracer gas experiments

Several tracer gas experiments have been conducted in the EPA IAQ test house. These experiments were conducted under a range of house operating conditions such as HAC on continuously, HAC off, HAC on an on/off cycle, windows open, etc. Comparison of model predictions with these data can be used to verify model assumptions regarding air flow in the house and model response to changing conditions independent of the source and sink effects. A plot of predicted versus measured tracer gas concentrations is shown in Figure. A plot of predicted versus measured values is shown in Figure 4. The ASTM criteria are given in Table 2. The agreement between the model predictions and the measured data is excellent. These results demonstrate that the model is able to capture the dynamics of air movement in the test house.

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