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©Retrotec 2017
Measure the Air Handler system flow ..................................................... 58
Measure with a DucTester as a powered flow hood on the return ......................... 58
Supply plenum pressure matching method .......................................................... 59
Set pressure in front of return register to zero method or using your Blower Door
Measure with a DucTester on the air handler cabinet ........................................... 63
Measure with a Blower Door attached to the return or cabinet ......................... 64
Estimate HVAC system energy loss from ducts ........................................ 65
Field Check the DucTester to find out what is not working ...................... 69
Avoid common mistakes ......................................................................... 70
Create a Blower Door with a DucTester fan ............................................. 72