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Appendix
xg0207 - 170223
Appendix A: venting Terminations
Covered
Alcove Detail
17.5’’
11.5’’
2’
2’
Covered
Alcove Detail
Vinyl Siding
Must use Vinyl Siding
Termination Shield
29.5’’
17’’
2’
2’
location
Canada*
usa**
A
clearance to the termination frame above grade, veranda, porch, deck, or balcony
12 inches
12 inches
B
clearance to top of doors or operable windows
12 inches
12 inches
C
clearance to sides or bottom of door or operable windows
12 inches
9 inches
D
clearance to permanently closed window when installed with approved glass penetration termination
0
0
E
clearance to permanently closed window Recommended to prevent condensation
16 inches
16 inches
F
clearance to ventilated soffit located within a horizontal distance to 24 inches from centerline of termination
22 inches
22 inches
G
clearance to unventilated soffit
30 inches to combustibles
16 inches to non-combustibles
30 inches to combustibles
16 inches to non-combustibles
H
clearance to outside corner
9 inches
9 inches
I
clearance to inside corner
12 inches
12 inches
J
clearance to each side of the vertical centerline of a metre or regulatory assembly to a maximum vertical distance of 15ft
3 feet
3 feet
K
clearance to service regulator vent outlet
3 feet
3 feet
L
clearance to non mechanical air supply inlet to the building or combustion air inlet to other appliance for appliance <=
100.000 BTU/H (30 KW)
12 inches
12 inches
M clearance to forced air supply inlet
6 feet
3 feet above air inlet
N
clearance above paved sidewalk or paved driveway located on public property
7 feet
7 feet
P
clearance under veranda, porch, deck, or balcony
22 inches to combustibles
16 inches to non-combustibles
22 inches to combustibles
16 inches to non-combustibles
Q clearance above roof
2 feet
2 feet
R
clearance to adjacent walls and neighboring buildings
2 feet
18 inches
S
clearance from corner in recessed location
12 inches
12 inches
T
Maximum depth of recessed location
4 feet
4 feet
U
Maximum width for back wall of recessed location
2 feet
2 feet
V
Horizontal clearance between two terminations that are level
0
0
W Horizontal clearance (centre to centre) between two terminations that are not level
18 inches
18 inches
note 1: For n a vent shall not terminate directly above the sidewalk or paved driveway which is located between two single family dwellings and serve both dwelling.
note 2: For P only permitted if veranda, porch, deck, or balcony is fully open on a minimum of two sides beneath the floor
note 3: For J, K, and as specified in cgA b149 installation code. local codes or regulations may vary.
* based on cgA b149.1 natural gas and Propane installation code. local codes may vary, please check with local regulatory agency.
** Based on ANSI Z223.1/NFPA 54 National Fuel Gas Code. Local codes may vary, please check with local regulatory agency.
