Retrotec Multi-Fan Blower Door - Manual (Page 17)

Page 17 of 37
©Retrotec Inc. 2015
5.2 Multiple Zones, one fan per zone:
Testing multiple zones can require one fan on each separate zone. These zones can be adjacent rooms
or separate floors.
Problem 2: Uneven building test pressures between zones can be caused by a Common set point
control as shown in Figure 14. The same control signal can create uneven pressures in unconnected
zones. This happens when one zone is leakier than the other.
Figure 14: Problem2: Uneven pressures between zones caused by Common set point control
Solution 2: Use Individual set point control (“Individual Control” turned On).
Eliminate the problem of being unable to reach the same pressure in separate zones by controlling each
fan individually with its own gauge. The solution is depicted in Figure 15.
To perform this with FanTestic, click Tools →Advanced Options → Settings tab → check “Individual
Control”
Figure 15: Solution2: Keep pressures even between zones with Individual set point control
50 Pa 60 Pa
50 Pa 50 Pa
Target pressure: 50 Pa
Target pressure: 50 Pa
Primary
Gauge