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Installation Manual
Stainless Steel - Concentric Vent / Air Intake Kit Installation Manual | 10.2009
Technical specifications are subject to change without prior notice
1 Introduction
CAUTION:
The following is not a substitute for the tankless
water heater installation manual. The entire
installation must conform with the specifications
listed in the tankless water heater installation
manual.
The following stainless concentric vent kit is designed to
provide one penetration point through the exterior wall for
both combustion air and exhaust vent piping. This kit is
only for horizontal sidewall terminations. It is not approved
for through the roof, vertical terminations. The stainless
concentric vent kit is compatible with the following Bosch
tankless water heaters:
• GWH 2400 ES
• GWH 2700 ES
• GWH 715 ES
• Evolution 500
1.1 Items included with Concentric Vent kit:
See Figure 1
Fig. 1
Concentric vent kit components
Item 1
Item 2
Item 3
• Item 1 - intake pipe connector
• Item 2 - exterior wall chase
• Item 3 - bag of screws
This kit can be ordered from your local supplier
(part# ESHCK).
1.2 Venting material compatibility
The exhaust vent piping used with this kit must be 3" sealed
single wall stainless steel (AL29-4C). The combustion air
piping used with this kit must be 3" sealed PVC or any other
rigid pipe.
Only tee terminals are approved for use with the
concentric vent / air intake kit (see Table 1).
A p p r o v e d
terminals
Manufacturer part numbers
Z-flex
Protech
Heat Fab
3" Tee
Terminal
2SVSTTF03
FSTT3
9390TEE
Table 1 Approved Tee Terminals
The exhaust vent piping and tee terminal used with
the kit must be from the same vent pipe
manufacturer.
1.3 Concentric Vent kit dimensions
19"
15"
3"
3"
5"
5" 8"
Fig. 2 Concentric Vent kit dimensions
