Retrotec DucTester 341 - Manual (Page 6)

Page 6 of 83
©Retrotec Inc. 2014
10.9.1. With Office 2007: .................................................................................................. 52
10.9.2. With Office 2010 ................................................................................................... 52
11. Find air leaks in the ducts ........................................................................ 53
11.1 Using a smoke puffer ............................................................................................ 53
11.2 Using theatrical smoke ......................................................................................... 53
11.3 Using an infrared camera ...................................................................................... 53
11.4 Using a wet hand .................................................................................................. 53
11.5 Using a Pressure Pan............................................................................................. 53
12. Measure the Air Handler system flow ..................................................... 55
12.1 For Code compliance ............................................................................................ 55
12.2 Why measure the Air Handler system flow? .......................................................... 55
12.3 Measure with a DucTester as a powered flow hood on the return ......................... 55
12.4 Measure with a DucTester on the air handler cabinet ........................................... 57
12.5 Measure with a gauge and a flow grid ................................................................... 57
12.6 Measure using air handler blower curves .............................................................. 57
12.7 Measure using Hole Flow on the gauge ................................................................. 58
12.8 Measure with a Blower Door attached to the return or cabinet ............................. 58
12.9 Other methods ..................................................................................................... 58
13. Estimate HVAC system energy loss from ducts ........................................ 59
13.1 Duct Air Leakage Measurements ........................................................................... 59
13.2 Methodology ........................................................................................................ 59
14. Field Check the DucTester to find out what is not working ...................... 63
14.1 Field Check the gauge ........................................................................................... 63
14.2 Field Check the DucTester as a system .................................................................. 63
15. Avoid common mistakes ......................................................................... 65
16. Create a Blower Door with a DucTester fan ............................................. 66
16.1 Use a DucTester to test tight enclosures................................................................ 66
16.2 Blower Door systems for testing tight enclosures .................................................. 66
Appendix A: Calculate Air Flow based on Channel B Fan Pressure readings ...... 68
Appendix B: Flow Conversion Tables ................................................................ 69
Flow Conversion Table for Duct Test Pressure of 25 Pa ..................................................... 69
Appendix C: Calculate flow if required test pressure cannot be reached .......... 70