Installation Guide

Polypropylene (PP) Common Venting Installation Instructions 24
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Exhaust Vent Terminaon Clearances
Other than direct vent, when using room air for combuson, you must install terminaons to expel exhaust.
SNOW
TERMINATION
Clearance in
Ref. A also
applies to
anticipated
snow line
Canadian Installations
(CSA B149.1)
U.S. Installations
(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 * *
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 m)
*
J
Clearance to non-mechanical 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] *
M Clearance under veranda, porch, deck, or balcony 12 in. (30 cm) [2] *
Clearance to opposite wall is 24 in. (60 cm).
[1] A vent shall not terminate directly above a sidewalk or paved drive-
way 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 con-
forme aux codes d’installation locaux et aux exigences du
foumisseur de gaz.)
AIR SUPPLY INLET
VENT TERMINAL
AREA WHERE TERMINAL
IS NOT PERMITTTED
X
V