35
Fitting metal supply air/extract air valves
a
4.
1.
2.
3.
Fig. 33
Example with wall mounted extract air valve
Nominal diameter
Dimension a in mm
DN 125
135
Note on step 2:
Insulate the ductwork connection with permanently
flexible material against structure-borne noise trans-
mission.
Fitting plastic supply air/extract air valves
135
1.
3.
2.
Fig. 34
Example with wall mounted extract air valve
Note on step 2:
■
Insulate the ductwork connection with permanently
flexible material against structure-borne noise trans-
mission.
Supply air/extract air valves
(cont.)
5793 589 GB