Figure 4
The scatter plot is drawn on a coordinate plane and compares air change rates from two tracer gas methods. The horizontal axis is labeled “A C H from C O 2 Tracer Gas Test (1 per hr)” and ranges from 0 to 6 in increments of 2 unit. The vertical axis is labeled “A C H from Water Vapor Tracer Gas Test (1 per hr)” and ranges from 0 to 6 in increments of 2 unit. A solid black diagonal reference line runs from (0, 0) to (6, 6). A legend identifies eight colored markers labeled “Test 1” through “Test 8”, each with vertical error bars. The plotted points are as follows: Test 1 is located at (0.9, 0.9); Test 2 is located at (1.8, 0.5); Test 3 is located at (2.9, 0.4); Test 4 is located at (2.6, 0.5); Test 5 is located at (2.3, 0.4); Test 6 is located at (0.7, 0.4); Test 7 is located at (5.2, 1.3); and Test 8 is located at (5.1, 3.1). Most points lie below the diagonal reference line, indicating lower water vapor–based A C H values compared to C O 2-based A C H values. Note: All numerical data values are approximated.Comparison of air change rates from water vapor and CO2 tracer gas tests performed on the penn ger. Source(s): Authors’ own work