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Figure 15 - Concentric Vent Terminations
Combustion
Air
Vent
1" (2.54cm)
Maximum
Maintain 12"
clearance above
highest anticipated
snow level or grade
* See Note
Below
Vent
Combustion
Air
36"(0.9m) Minimum
Maintain 12"(30cm)
clearance above highest
anticipated snow level or
grade
12" (30cm) Minimum
*Must be less than 4" or greater than 24" Horizontal dis-
tance between end bells of each air intake to prevent fl ue
gas recirculation.
1" (2.54cm)
Maximum
Overhang
VENT
COMBUSTION AIR
COMBUSTION
AIR
1” MAXIMUM
NOTE:
SECURING STRAP MUST BE FIELD INSTALLED TO
PREVENT MOVEMENT OF TERMINATION KIT IN SIDE
WALL.
ELBOW
(FIELD SUPPLIED)
A
A
B
B
C
C
STRAP
(FIELD SUPPLIED)
VEN
T
Figure 16 - Concentric Vent
COMBUSTION AIR AND VENT PIPE
Figure 17 - Concentric Vent Roof
Installation
VENT
VENT
A
A
B
B
C
C
D
D
COM
AIR
COMBUSTION AIR
ROOF BOOT/FLASHING
(FIELD SUPPLIED)
ELBOW
(FIELD SUPPLIED)
SUPPORT
(FIELD SUPPLIED)
MAINTANIN 12 IN.
(18IN. FOR CANADA)
MINIMUM CLEARANCE
ABOVE HIGHEST
ANTICIPATED SNOW
LEVEL. MAXIMUM OF
24 IN. ABOVE
ROOF
NOTE:
SUPPORT MUST BE
FIELD INSTALLED TO
SECURE TERMINATION
KIT TO STRUCTURE.