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2
Non-Direct Vent
Room Air Termination Clearances
TERMINATION
SNOW
Ref
A
Clearance above grade, veranda, porch, deck, or balcony
B
Clearance to window or door that may be opened
C
Clearance to permanently closed window
Vertical clearance to ventilated soffit, located above the
terminal within a horizontal distance of 2 ft (61 cm) from
D
the center line of the terminal
E
Clearance to unventilated soffit
F
Clearance to outside corner
G
Clearance to inside corner
Clearance to each side of center line extended above
H
meter/regulator assembly
I
Clearance to service regulator vent outlet
Clearance to non-mechanical air supply inlet to building or
J
the combustion air inlet to any other appliance
K
Clearance to a mechanical air supply inlet
Clearance above paved sidewalk or paved driveway located
L
on public property
M
Clearance under veranda, porch, deck, or balcony
[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 mini-
mum of two sides beneath the floor.
24
(Room Air)
Clearance in
Ref. A also
applies to
anticipated
snow line
Description
Clearance to opposite wall is 24 in. (60 cm).
Canadian Installations
(CSA B149.1)
Other than direct vent
(Outdoor unit and/or Room Air)
12 in. (30 cm)
36 in. (91 cm)
*
*
*
*
*
*
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 m)
36 in. (91 cm)
6 ft (1.83 m)
7 ft (2.13 m) [1]
12 in. (30 cm) [2]
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.)
Rinnai Commercial Hybrid System Installation and Operation Manual
AIR SUPPLY INLET
V
VENT TERMINAL
AREA WHERE TERMINAL
IS NOT PERMITTTED
U.S. Installations
(ANSI Z223.1 /NFPA 54)
Other than direct vent
(Outdoor unit and/or Room Air)
12 in. (30 cm)
4 ft (1.2 m) below or to side of opening;
1 ft (300 mm) above opening
*
*
*
*
*
*
*
4 ft (1.2 m) below or to side of opening;
1 ft (300 mm) above opening
3 ft (91 cm) above if within 10 ft
(3 m) horizontally
*
*
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