Retrotec Commercial 441 and 451 DucTester User Manual
Page 47
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Page 47 of 56
©Retrotec Inc. 2015
When CFM is being measured at the specified Test Pressure, a sheet is often used where there
are multiple duct runs. Individual measurements are made and added to the spreadsheet.
Sometimes results are measured at different test pressure; they should be added to any data
collection sheet the tester has been supplied with. Flows should be totaled.
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