Bosch 250SX LP Manual page 10

Appliance details
The maximum flue gas exhaust temperature on the 250 SX 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. The total vent length must be reduced by 1 ¼
feet for every 45° elbow used in the vent system.
** 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.
Table 2
10
* Exhaust * Exhaust
vent vent
maximum minimum
length length
26 feet (8 3 feet
m) with one
elbow. Less
2½ feet for
each
additional
90° elbow
26 feet (8 3 feet
m) with one
elbow. Less
2½ feet for
each
additional
90° 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
90° 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
6 720 607 057