Instructions / Assembly

Outdoor Conversion Manual 7
Non-Direct Vent Clearances (Room Air and Outdoor Installations)
I
Regulator vent outlet. In the
event no regulator is present,
H and I can be disregarded.
V
Canadian Installations
1
(CSA B149.1)
U.S. Installtions
2
(ANSI Z223.1/NFPA 54)
Ref Description
Other than direct vent
(Outdoor unit and/or Room Air)
Other than direct vent
(Outdoor unit and/or Room Air)
A
Clearance above grade, veranda, porch,
deck, or balcony
12 in. (30 cm) 12 in. (30 cm)
B
Clearance to window or door that may be
opened
36 in. (91 cm)
4 ft (1.2 m) below or to side of
opening; 1 ft (300 mm) above opening
C Clearance to permanently closed window * *
D
Vertical clearance to ventilated soffit, located
above the terminal within a horizontal
distance of 2 ft (61 cm) from the center line of
the terminal
* *
E Clearance to unventilated soffit
* *
F Clearance to outside corner
* *
G Clearance to inside corner * 12 in. (30 cm)
H
Clearance to each side of center line
extended above meter/regulator assembly
3 ft. (91 cm) within a height 15 ft.
(4.6 m)
*
I Clearance to service regulator vent outlet 3 ft. (91 cm) *
J
Clearance to nonmechanical air supply inlet
to building or the combustion air inlet to any
other appliance
36 in. (91 cm)
4 ft (1.2 m) below or to side of
opening; 1 ft (300 mm) above opening
K Clearance to a mechanical air supply inlet 6 ft (1.83 m)
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 ft (2.13 m) [1]
Vents for Category II and IV
appliances cannot be located above
public walkways or other areas where
condensate or vapor can cause a
nuisance or hazard.
M
Clearance under veranda, porch, deck, or
balcony
12 in. (30 cm) [2] *
1
In accordance with the 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.
If locally adopted installation codes specify clearances different than those illustrated, then the most stringent clearance shall prevail.
Clearance to opposite wall is 24 in (60 cm).
[1] A vent shall not terminate directly above a sidewalk or paved driveway that is
located between two single family dwellings and serves both dwellings.
[2] Permitted only if veranda, porch, deck, or balcony is fully open on a minimum
of two sides beneath the floor.
*Clearances are in accordance with local installation
codes and the requirements of the gas supplier.
(Dégagement conforme aux codes d’installation
locaux et aux exigences du foumisseur de gaz.)
SNOW
TERMINATION Figure 5