Fig. 10 FDA-BU, fire damper. - dimensions of plasterboard 12.5 mm.
Fig. 11 FDA-BU, fire damper. - FDA-BU damper installation in a wall.
1 - concrete, cellular concrete block or solid brick wall;
2 - 12,5 mm plasterboard cover; 3 - concrete, mortar or fireproof gypsum
4 - steel ventilation duct with a wall thickness of 0.5 mm; 5 - FDA-BU damper.
ALNOR
®
ventilation systems
is a legally protected trademark and technical patent. All rights reserved.
26
w
w
w
.al
nor
.c
om.
pl
Technical documentation
FDA-BU