Retrotec Blower Door with DM32 - Manual (Page 4)

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Perform a Blower Door test on the building and
record the EqLA at 50 Pa.
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Install cardboard in upper part of doorway with a
20 x 20 inch hole cut in it.
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Perform a second Blower Door test on the
building, record the EqLA at 50 Pa.
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Subtract the first result from the second result
and the value should be 400 sq. in. (+/-10%).
Speed control is handled automatically with FanTestic
software, for complete automation.
Control fan speed with software Field check system monthly
Alternatively, use a Verification Plate in an optional
double hole Door Panel, or use the optional Flex Duct
with a 400 sq. in. hole in a plate on the end.
Page 4 of 4
Field check gauge weekly
Check gauge operation and check for blocked, leaking or
pinched tubes weekly, and anytime results are in question.
To perform the gauge check, you will need the gauge
and Umbilical.
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Set [Time Average] to 5 seconds in [Settings].
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Tap [Channel B] and select“Pressure: Pa”.
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Connect the red tube between the red and
yellow ports.
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Repeat between different ports with each of the
tubes you use for testing.
If readings on Channel A and Channel B are within
2% and don’t drop rapidly, the tube is not blocked
or leaking and the gauge is correct.
Checking your gauge
and tubes regularly will
eliminate a common
source of error in
readings.