Alternative Building leakage flange.
To measure the leakage flow with a leakage tester for buildings. The measuring flange is used for a lower flow than the flange that is included as standard.
Fan forward: 12-70 l/s
Fan backward: 10-45 l/s
K-factors are given for both forward and backward fan direction.
Opening diameter: 110mm
Uncertainty with leakage tester:
<±7% read value