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8 | Concentric Horizontal Vent Kit
The appliance adapter can be swivelled around its
vertical axis.
Measure the length of the vent terminal assembly (Fig. 4,
[1]) taking into account the thickness of the outside wall [S]
and the distance from the outside wall to the end of the vent
pipe [L]). It is recommended to keep at least 4" (100mm)
clearance from the ceiling or joists for accessibility reasons.
1/4" per foot
(50 mm per meter)
F
ig. 4 Penetration through the outside wall
Select the required diameter [K] of the hole in the wall
according to the wall thickness S.
Sizing hole penetration
Wall Thickness S
6" - 9 ½" (150 - 240 mm)
9 ½" - 16½" (240 - 420 mm)
16½" - 20 ⅞" (420 - 530 mm)
Cut the hole in the wall while allowing clearance for the
required pitch of the air/vent pipe up to a maximum of 3/8"
wider than the air supply pipe
Data subject to change
1
S
Diameter K
7 1/4" (155 mm)
7 1/2" (165 mm)
8" (170 mm)
Extending the concentric pipe length is permissible. The
maximum straight vent length allowed is dependant on
appliance type and number of elbows used. See tables
below.
Maximum straight vent pipe length allowed for Ø 4" / Ø 6"
(Ø 100/150mm) concentric pipe
# of 90° elbows
Maximum straight vent pipe length allowed
used
1
2
3
4
5
6
Friction Loss Equivalent for Fittings
Fitting
45 deg 4"/6" (100/150mm), PolyPro Elbow
90 deg 4"/6" (100/150mm), PolyPro Elbow
Example:
—
Model: GB162-80
—
90° elbows used: 3
—
45° elbows used: 0
Maximum straight vent pipe allowed: 19ft (5.791m)
Slide the outer wall seal [2] onto the terminal [1] as shown.
1
Fig. 5
Installation Manual
22ft (6.705m)
20ft (6.096m)
19ft (5.791m)
17ft (5.181m)
15ft (4.572m)
13ft (3.962m)
Equivalent
feet
m
3.7
1.14
5.6
1.72
2
Bosch Thermotechnology Corp.
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