Retrotec DucTester 200 Series Residential Applications - Manual (Page 37)

Page 37 of 91
©Retrotec Inc. 2015
Figure 36: Method #1 Duct Leakage to Outdoors, under depressurization
7. If the Blower Door pressure reading fluctuates more than 2 Pa, press [Time Avg] and increase the
time averaging to reduce it. If still above 2 Pa, use the Baseline feature as outlined in the DM-2
QuickGuide or DM-2 Operations Manual.
8. Press [@ Pressure] on the DucTester gauge to display the duct leakage result "@25Pa".
9. Record “Flow” on the DucTester gauge which represents Duct Leakage to Outdoors
If your test requires 50 Pa, substitute 50 for 25 in all instructions.
Figure 37: Method #1 Duct Leakage to Outdoors, under pressurization
5.2.2. Method #2: Set duct to house pressure to 0 Pa (using DucTester gauge)
Method 2 does not require connecting a red tube from the DucTester gauge to outdoors, but will result
in huge errors if
[@ Pressure] is turned on. If your standard requires 50 Pa, substitute 50 for 25 in all
instructions.
1. Complete the previous Total Duct Leakage test.
2. Ensure all doors and windows are still closed and exhaust fans are still off.
3. Connect the Blower Door per diagram in Figure 38 (depressurization) or Figure 39 (pressurization).