4 Installing the BlowerDoor Measurement System
BlowerDoor Standard
January 2022
47
4.6.2
Overview of the positive pressure test / pressurization measurement
Fig. 4.31
For a
positive pressure test
, the fan is
turned
around
. The flow rings point outwards, and air is
sucked into the building.
The tubing connections do not change.
Optional:
If you encounter strong pressure fluctuations while
recording the pressurization series, connect a
separate transparent tube to the free connection of
Channel A on the DG-1000 and place the end of the
tube into a flow-reduced area.
If flow ring D or E is used, the red tubing should be connected to ring D instead of to the fan.