Retrotec DucTester 200 Series Residential Applications - Manual (Page 38)

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©Retrotec Inc. 2015
4. With DucTester fan off, set the Blower Door to 25 Pa by pressing [Set Pressure] [25] [Enter] on
the Blower Door gauge.
Figure 38: Method #2: Duct Leakage to Outdoors, under depressurization
5. Press [@ Pressure] if required to remove “@” from the display on the DucTester gauge.
6. Set the DucTester to 0 Pa by pressing [Set Pressure] [0] [Enter] on DucTester gauge.
7. When 0 Pa +/– 1 is achieved on the DucTester gauge, record “Flow” from the DucTester gauge, which
is Duct Leakage to Outdoors.
Figure 39: Method #2 Duct Leakage to Outdoors, under pressurization
5.3 Duct Leakage to Outdoors with 1 gauge and 2 fans
Duct Leakage to Outdoors may be measured using only one gauge to alternatively measure the house to
outdoor pressure then the duct to outdoor pressure, until the house and ducts are at the same pressure