Bosch GWH-635-ES-N Manual page 10

Appliance details
The maximum flue gas exhaust temperature on the GWH-635-ES is 437°F (225°C)
Venting Exhaust
Options vent
diameter
and
material
Room 3 inch
sealed stainless
(twin pipe) steel
(AL29-4C)
sealed vent
pipe
Open 3 inch
combustion stainless
(single steel
pipe) (AL29-4C)
sealed vent
pipe
Exhaust vent is always fan assisted. Installation of exhaust vent and combustion air piping may be run vertically or horizontally
and in separate directions if required.
* A maximum of three 90 degree elbows are permitted in the total vent length.
** Stainless steel (AL29-4C) vent pipe is manufacturerd by Z-Flex, Protech and Heat Fab. NOTE: clearance distances are
variable depending if the vent pipe is installed in an enclosed or unenclosed space, the exhaust flue gas temperature and the
orientation of the vent pipe.
Never reduce pipe diameter.
Table 2
10
* Exhaust * Exhaust
vent vent
maximum minimum
length length
26 feet (8 1½ feet
m) with one
elbow. Less
2½ feet for
each
additional
elbow
26 feet (8 1½ feet
m) with one
elbow. Less
2½ feet for
each
additional
elbow
Combustion Combustion
air pipe air pipe
diameter maximum
and material length
3 inch PVC, 26 feet (8
aluminum or m) with one
galvanized elbow. Less
pipe 2½ feet for
each
additional
elbow
See See
chapter 2.8 chapter 2.8
Vent pipe Vent pipe
clearances clearances
within an within an
unenclosed enclosed
space space
** See vent ** See vent
manufacturer's manufacturer's
specifications specifications
** See vent ** See vent
manufacturer's manufacturer's
specifications specifications
6 720 607 072 (16 January)