ECR International Utica Boilers UB90-50 Installation, Operation & Maintenance Manual page 25

Figure 13 - Side Wall Vent / Intake terminations - Less Than 12" Clearance Above Grade
Less Than 12" Clearance
Figure 14 - Side Wall Vent/Intake Terminations - 12" Or More Clearance Above Grade
12" Or More Clearance
COMBUSTION AIR AND VENT PIPE
12"
MINIMUM
12"
MINIMUM
90°
VENT
12"
MINIMUM
12"
MINIMUM
90°
VENT
MAXIMUM
SEPARATION
18"
MAXIMUM
MAXIMUM
SEPARATION
18"
MAXIMUM
12"
MINIMUM
VENT
12"
MINIMUM
90°
12"
BRACKET
MINIMUM
VENT
12"
3" MINIMUM
MINIMUM
3"
SEPARATION
MAXIMUM
90°
SEPARATION
BRACKET
18"
3"
MAXIMUM
MAXIMUM
SEPARATION
OVERHANG
12" MINIMUM
OVERHANG
12" MINIMUM
3"
15"
MAX
3"
15"
MAX
OVERHANG
12" MINIMUM
12" SEPARATION
BETWEEN BOTTOM
OVERHANG
OF AIR INTAKE AND
BOTTOM OF VENT
12" MINIMUM
12" SEPARATION
BETWEEN BOTTOM
OF AIR INTAKE AND
BOTTOM OF VENT
36" MIN
25
36" MIN
12" SEPARATION
BETWEEN BOTTOM
OF AIR INTAKE AND
BOTTOM OF VENT
12" SEPARATION
MAINTAIN 12" MIN
BETWEEN BOTTOM
CLEAR ABOVE HIGHEST
OF AIR INTAKE AND
SNOW LEVEL OR GRADE
BOTTOM OF VENT
MAINTAIN 12" MIN
36" MIN
CLEAR ABOVE HIGHEST
SNOW LEVEL OR GRADE
36" MIN
MAINTAIN 12" MIN
CLEAR ABOVE HIGHEST
SNOW LEVEL OR GRADE
MAINTAIN 12" MIN
CLEAR ABOVE HIGHEST
SNOW LEVEL OR GRADE
P/N 240010135 Rev. D [04/15/2017]