15
Installation
≥ 75 mm
≥ 75 mm
≥ 200 mm
≥ 200 mm
≥ 50 mm ≥ 50 mm
≥ 200 mm
≥ 25 mm
1. Principle
According to the European test standard, a fire damper must
be installed at a minimum distance of 75 mm from an adjacent
wall and 200 mm from another damper, unless the solution was
tested at a shorter distance.
This range of Rf-t fire dampers has been successfully tested
and can be installed in a vertical or horizontal supporting
construction, at a distance below the minimum set by the
standard.
For rectangular dampers, the minimal distance is set to 50 mm
between 2 dampers or between a damper and a vertical wall,
and to 25 mm between a damper and a floor/ceiling.
A
B
2. Certified solution
For the Rf-t fire dampers, the solution consists of the following
elements: A: Universal sealing for minimal distance; B:
Sealing compliant with existing classifications (Declaration of
Performance).
A. Sealing of the opening at the side with minimal distances
between damper and wall/ceiling: rigid stone wool panels
(150 kg/m³) are applied to a depth of 400 mm (for a wall of
100 mm for instance: 100 mm in the wall + 150 mm on each
side of the wall).
This sealing is applied over the whole width/height of the
damper(s).
When the damper is installed at a distance of 25 mm from a
floor/ceiling, the rigid high-density stone wool panels (A) may
be replaced with standard 40 kg/m³ stone wool, compressed by
at least 40%.
B. Sealing of the rest of the opening according to the existing
classifications for the fire damper (Declaration of Performance).
Details for each wall/sealing combination are given under the
corresponding title of this installation guide.
50 mm
25 mm
200 mm
3. Restrictions
The installer may choose the direction of the blade axis freely:
horizontal or vertical axis.
A maximum of 2 rectangular dampers can be installed at
a minimum distance from one another, both vertically and
horizontally (maximum cluster of 4 dampers).
Note: when sealing the opening with panels of fire resistant
stone wool, the maximum number of dampers also depends
on the maximum “blank seal” allowed for the selected sealing
material. Please refer to the manufacturer’s instructions for this
information.
1
2
3
Installation at a minimal distance from another damper or from an adjacent supporting construction
