Retrotec Multi-Fan Blower Door - Manual (Page 32)

Page 32 of 37
©Retrotec Inc. 2015
7. Exterior pressure pickup locations
Various standards have different recommended locations for pressure pickups, and under specific situations.
The following table lists these recommendations:
Table 2: Recommended locations for exterior pressure pickups
Exterior pressure pick-up locations from Standards
ASTM
1 tube across the middle of each façade (NOT at corners of the building)
Manifold and average all pressure readings using a manifold (averaged ver 10s)
If > 3 stories, measured at more than 1 height
ATTMA
Measured at the lowest floor level of the building
Located "some distance away" from the building envelope, out of the way of fan airflow and sheltered from
wind
CGSB
Calm conditions - 1 pressure measurement outside the building is ok
Windy - min of 4 measurements on each façade, manifold
Gusty winds - use wind damping kit (capillary tubes, averaged over 5s)
EN13829-FR
Measure at the bottom floor level, but if tall building, measure at the top as well
Keep exterior pressure taps out of the sun, and fitted to a T-pipe or connected to a perforated box to protect
from wind
USACE
Min 1 exterior pressure tap required, but if bias pressures high, use more
Interior pressure gauge references tied together in a manifold to read 1 pressure reading