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Exterior Vent Termination Requirements
Minimum Clearance Requirements
Clearance above grade, veranda, porch, deck, or balcony
A
Clearance to window or door that may be opened
B
Clearance to permanently closed window
C
Vertical clearance to ventilated soffit located above the terminal within a horizontal distance of 2 feet (61cm)
D
from the center line of the terminal (check with the local code)
Clearance to unventilated soffit
E
Clearance to outside corner: with AstroCap Termination Cap.
F
Clearance to outside corner: with all other approved Termination Caps.
Clearance to inside corner: with AstroCap Termination Cap
G
Clearance to inside corner: with all other approved Termination Caps.
Clearance to each side of center line extended above meter/regulator assembly
H
Clearance to service regulator vent outlet
J
Clearance to non-mechanical air supply inlet to building or the combustion air inlet to any other appliance
K
Clearance to a mechanical air supply inlet
L
Clearance above paved sidewalk or a paved driveway located on public property
M
Clearance under veranda, porch, deck, or balcony
N
1
In accordance with current CSA B149.1, Natural Gas and Propane Installation Code
2
In accordance with the current ANSI Z223.1/NFPA 54, National Fuel Gas Code
┼
A vent shall not terminate directly above a sidewalk or paved driveway which is located between two single family dwellings and serves both dwellings
‡ Permitted only if veranda, porch, deck, or balcony is fully open on a minimum of two sides beneath the floor
* Clearance in accordance with local installation codes and the requirements of the gas supplier
a
3 feet (91cm) within a height of 15 feet (4.5m) above the meter / regulator assembly
b
3 feet (91cm) above - if within 10 feet (3m) horizontally
1
Canada
12"(30cm)
12"(30cm)
*
24"(60cm)
24"(60cm)
13"(33cm)
13"(33cm)
13"(33cm)
13"(33cm)
a
36"(90cm)
36"(90cm)
12"(30cm)
72"(1.8m)
┼
84"(2.1m)
12"(30cm)
‡
Regency Horizon ® HZ54E-11 Gas Fireplace
installation
2
USA
12"(30cm)
9" (23cm)
*
24"(60cm)
24"(60cm)
13"(33cm)
13"(33cm)
13"(33cm)
13"(33cm)
*
*
9" (23cm)
b
36"(90cm)
*
*
25
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