9 Mounting preparations
11
9.1 Requirements in line with ap-
proval
9.1.1 Approval provisions
Approval provision ER-APB
ER-AP
Number of units per
floor, residential unit
or fire zone
Max. 3
fans or 3
connec-
tions
Max. 2
fans
or 2 connec-
tions
Shaft wall
min. 35
mm , board
materials
(F90)
min. 35 mm ,
board mater-
ial, any
Connection ducts
in-
side
the shaft
AFR 80 flexible alu-
minium duct
between the
main duct in the shaft and
unit, max. 2 m long (→ ap-
proval).
Connection ducts
outside
the shaft
Steel fol-
ded spiral-
seams
duct
,
between
the main
duct in the
shaft and
the unit,
max. 2 m
long (→
approval).
Steel folded
spiral-seams
duct or flex-
ible alu-
minium duct
,
between the
main duct in
the shaft and
the unit, max.
2 m long (→
approval).
Duct elbows in the
unit connection duct
Max. 90° bend,
ascending
Number of duct el-
bows permitted for
wall installation
Max. 1 x
90°
Max. 2 x 90°
Number of duct el-
bows permitted for
ceiling installation
Max. 2 x
90°
Max. 3 x 90°
Regulating equip-
ment in the exhaust
air duct
Not permitted
Wall/ceiling opening
for DN 80 unit con-
nection duct
Brickwork or concrete:
130 mm.
Board materials (F90):
Outer Ø of pipe
9.2 Permitted installation positions:
Wall installation, top left corner of room
Wall installation, top right corner of room
Ceiling installation
