Installation Sheet

28 Page
-Vent terminaon clearances-
Canada U.S.A
Direct-vent and other than
Direct-vent
Direct-
vent
Other than
Direct-vent
A Clearance above grade, veranda, porch, deck, or balcony 1 foot (30 cm) 1 foot (30 cm)
B Clearance to window or door that may be opened 3 feet (91 cm)
1 foot
(30 cm)
4 feet (120 cm) from
below or side opening.
1 foot (30 cm) from
above opening.
C Clearance to permanently closed window * * *
D
Vertical clearance to ventilated soffit located above the
vent terminator within a horizontal distance of 2 feet
(61cm) from the center line of the terminator
* * *
E Clearance to unventilated soffit * * *
F Clearance to outside corner * * *
G Clearance to inside corner * * *
H
Clearance to each side of center line extended above
meter/regulator assembly
* * *
I Clearance to service regulator vent outlet
Above a regulator within 3
ft (91 cm) horizontally of the
vertical center line of the
regulator vent outlet to a
maximum vertical distance of
15 ft (4.5 m)
* *
J
Clearance to non-mechanical air supply inlet to build-
ing or the combustion air inlet to any other appliance.
3 feet (91 cm)
1 foot
(30 cm)
4 feet (120 cm) from
below or side opening.
1 foot (30 cm) from
above opening.
 Clearance to mechanical air supply inlet 6 feet (183 cm)
3 ft (91 cm) above if within
10 ft (3 m) horizontally.
L
Clearance above paved sidewalk or paved driveway
located on public property
7 feet (213 cm)** * 7 feet (213 cm)
M Clearance under veranda, porch deck, or balcony 1 foot (30 cm)*** * *
*For clearances not specified in ANSI Z223.1 / NFPA 54 (US) or B149.1 (Canada), please use clearances in accordance with local
installation codes and the requirements of the gas supplier.
**A vent shall not terminate directly above a sidewalk or paved driveway that 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.
The vent for condensing water heaters shall not terminate:
1) over public walkways; or
2) near soffit vents or crawl space vents or other areas where condensate or vapor could create a nuisance or hazard or
cause property damage; or
3) where condensate vapor could cause damage or could be detrimental to the operation of regulators, relief valves, or
other equipment.
Installaon
Installaon Manual
H
D
E
L
B
V
V
V
V
B
F
C
B
B
B
V
V
V
V
V
X
X
A
J
M
Operable
Fixed
closed
Fixed
closed
Operable
B
Inside corner
detail
G
A
K
V
X
= Vent terminal
= Air supply inlet
= Area where the terminal
is not permied
Regulator vent outlet