Bosch AQUA STAR 250SX LP - Manual (Page 10)

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10
Appliance details
The maximum flue gas exhaust temperature on the 250 SX is 437°F (225°C)
Venting
Options Exhaust
vent
diameter
and
material * Exhaust
vent
maximum
length * Exhaust
vent
minimum
length Combustion
air pipe
diameter
and material Combustion
air pipe
maximum
length Vent pipe
clearances
within an
unenclosed
space Vent pipe
clearances
within an
enclosed
space
Room
sealed
(twin pipe) 3 inch
stainless
steel
(AL29-4C)
sealed vent
pipe 26 feet (8
m) with one
elbow. Less
2½ feet for
each
additional
90° elbow 3 feet 3 inch PVC,
aluminum or
galvanized
pipe 26 feet (8
m) with one
elbow. Less
2½ feet for
each
additional
90° elbow ** See vent
manufacturer's
specifications ** See vent
manufacturer's
specifications
Open
combustion
(single
pipe) 3 inch
stainless
steel
(AL29-4C)
sealed vent
pipe 26 feet (8
m) with one
elbow. Less
2½ feet for
each
additional
90° elbow 3 feet See
chapter 2.8 See
chapter 2.8 ** See vent
manufacturer's
specifications ** See vent
manufacturer's
specifications
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