10
1. Short extension duct
2. Flexible connector
L Air duct length
Lf Flexible part length of flexible connector
The length (Lf ) of the flexible element must be equal or higher to 1%
of air duct length.
The minimum length (Lf ) of the flexible element is equal to 250 mm
for circular damper.
The minimum length (Lf ) of the flexible element is equal to 100 mm
for rectangular damper.
1. Positioning brackets
2. Sealing
3. Short extension duct
4. Flexible connector
5. Floor
Use of flexible connectors in the case of remote installation
1. Duct
2. Flexible connector
3. Short extension duct
4. Fire damper
Example of damper support in case of installation within floor
with Fire Batt (Weichschott) sealing
1. Fire damper
2. Short extension duct
3. Flexible connector
4. C-shaped profile 36 x 36 x 2,5
mm, e.g. Würth or Müpro or Hilti
or equivalent
5. Fixing bracket 38 x 30 x 2 mm,
e.g. Würth or Müpro or Hilti or
equivalent
6. M10 screw
7. Washer
8. M10 nut
9. Fixing bracket 90° 36 x 33 x 5
mm, e.g. Würth or Müpro or Hilti
or equivalent
10. M10 threaded rod
Minimum distances
It is recommended to keep enough space for using the control
mechanism or for maintenance.
Maintain a minimum distance of 200 mm between fire damper and
any other element that crosses the wall (e.g: doors, electrical cables,
hydraulic pipes etc.) and between different fire damper models.
In accordance with Articles 7 and 13 of EN 1366-2 respect the mini-
mum distances indicated below.
