Using Carbon Dioxide as a Tracer Gas to Measure Air Change Rate ...

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Resolution Selection of tracer gas Carbon dioxide Relatively high PEL Inexpensive Easy to obtain and measure Acceptable to School personnel Selection of method Concentration Decay Test Method Measures the decay rate of carbon dioxide over time to calculate the air exchange rate. Regression Analysis InC(t) = -At + C(0) Boelter & Yates, Inc. 2004
Sample Time Air Change Rate (1/hr) 0.25 0.5 1 2 4 Boelter & Yates, Inc. 2004 Minimum Duration (hour) 4 2 1 .5 .25 Minimum sample duration based on 10% uncertainty at the 95% confidence level in the detection of air change rate, a tracer gas concentration measurement precision error of 5% of reading and various air change rate. Using the regression method reduces the minimum test duration due to more than 2 data points.
Page 1 and 2: Using Carbon Dioxide as a Tracer Ga
Page 3 and 4: Boiler Room Ventilation Research P
Page 5: Research Standard Test Method for
Page 9 and 10: Gas Injection and Distribution Boel
Page 11 and 12: School Indiana • 5500 ft 3 Boiler
Page 13 and 14: Elementary School Illinois • Meas
Page 15 and 16: Middle School Illinois 16,372 ft 3
Page 17 and 18: Measured Range of Boiler Room Venti
Page 19 and 20: HEPA Filtered Exhaust Machines for
Page 21 and 22: Carbon Dioxide Concentration (ppm)
Page 23 and 24: Benefits Carbon Dioxide as a trace
Page 25 and 26: 0.7 0.6 0.5 0.4 0.3 0.2 0.1 0 0 3 6

Using Carbon Dioxide as a Tracer Gas to Measure Air Change Rate ...

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