Retrotec DucTester 341 - Manual (Page 39)

Page 39 of 83
©Retrotec Inc. 2014
20. With DucTester fan off, set the Blower Door to 25 Pa by pressing [Set Pressure] [25] [Enter] on
the Blower Door gauge.
Figure 30: Method #2: Duct Leakage to Outdoors, under depressurization
21. Press [@] if required to remove extrapolation; “@ is Off” should then be displayed on the DucTester
gauge.
22. Set the DucTester to 0 Pa by pressing [Set Pressure] [0] [Set] on DucTester gauge.
23. When 0 Pa +/– 1 is achieved on the DucTester gauge, record “Flow” from the DucTester gauge, which
is Duct Leakage to Outdoors.
Figure 31: Method #2 Duct Leakage to Outdoors, under pressurization
8.3 Duct Leakage to Outdoors with 1 gauge and 2 fans