Retrotec Commercial 441 and 451 DucTester - Manual (Page 32)

Page 32 of 56
©Retrotec Inc. 2015
8. Avoid common mistakes
The following mistakes are commonly made when performing a duct test, and can significantly affect
the results.

Wrong Range Configuration and or wrong Device selected on gauge

Water in tube, pinched tube

No green reference tube attached while depressurizing ducts

Not covering all intentional duct openings

Tape sealing registers being blown off, usually happens in pressurization