Bosch SSB800 SA Installation And Service Instructions For Contractors page 54

54 | EXHAUST TERMINALS AND AIR INLET CLEARANCES
X
Y
Horizontal venting system (sealed combustion):
X ≥ 4" (102 mm);
Y ≥ 12" (305 mm)
Vent
Air intake
Multiple air and vent vertical termination:
X ≥ 12" (305 mm);
Y ≥ 12" (305 mm)
6720866942 (2018/06) US
Air intake Y
Vent
X
X
X
Y
Vertical venting system (sealed combustion):
X > 12" (305 mm)
Y = 12" (305 mm) above maximum snow level or at least 24" whichever
is greater
Air intake
Vent
X
Multiple air and vent vertical termination:
X ≥ 12" (305 mm);
Y ≥ 12" (305 mm)
X
Y
Air intake
Vent
Y
SSB