Vent Terminal Clearances - Pacific energy Classic Gas Installation And Operating Insctruction Manual

VENT TERMINAL CLEARANCES

Minimum clearances to the vent teminal must be maintained as shown in
figures #10 and #11. Measure clearances to the nearest edge of termination
hood.
NOTE: Vent terminal must not be recessed into a wall or siding. Follow
vent terminal manufacturers installation instructions.
NOTE: LOCAL CODES OR REGULATIONS MAY REQUIRE DIFFERENT
CLEARANCES.
a = clearances above the roof line [in USA 12 inches (30 cm)
minimum] [in Canada 24 inches (610 cm) minimum]
b = clearance to an adjacent wall [24 inches (610 cm) minimum]
Fig # 10
VENT TERMINAL
Canadian Installation
A
B 12" (30 cm)
C
D
E
F
G
H 3' (91 cm) within height of
15' (4.5 m) above meter/regulator 15' (4.5 m) above meter/regulator* assembly.
I 3' (91 cm) within height of
J 12" (30 cm)
K 6' (1.83 m)
t
L 7' (2.13 m)
+
M 12" (30 cm)
N
O
1 In accordance with current CSA B149, Natural Gas & Propane Installation Code
2
In accordance with current ANSI Z223.1 NFPA 54, National Fuel Gas Code
* These numbers are only estimates. Clearance in accordance with installation codes and the requirements of the gas supplier
t
Vent shall not terminate directly above a sidewalk or paved driveway located between two single family dwellings & it serves both dwellings
+ Permitted only if verandah, porch, deck, or balcony is fully open on a minimum or two sides beneath the floor.
INSIDE
CORNER
DETAIL
FIXED
CLOSED
OPEN-
ABLE
AIR SUPPLY INLET
1
American Installation
12" (30 cm)
9" (23 cm)
12" (30 cm)*
24" (60 cm)*
18" (45 cm)*
12" (30 cm)*
12" (30 cm)*
3' (91 cm) within height of
3' (91 cm)*
9" (23 cm)
3' (91 cm) above if within
10' (3 m) horizontally
t
7' (2.13 m)*
12" (30 cm)*
12" (30 cm)*
12" (30 cm)
Fig # 11
OPEN- FIXED
ABLE CLOSED
AREA WHERE TERMINAL
IS NOT PERMITTED
2
Above grade, verandah, porch, deck, or balcony.
From window or door that may be opened.
From permanently closed window (condensation).
To ventilated soffit located above the terminal, within a horizontal
distance of 2' (60 cm) from center-line of terminal.
To unventilated soffit.
To outside corner.
To inside corner.
To each side of center-line extended above a meter/regulator
Around service regulator vent outlet.
To non-mechanical air supply inlet to building, or the combustion
air inlet to any other appliance.
To mechanical air supply inlet.
Above public paved sidewalk/driveway.
+
Under verandah, porch, deck, or balcony.
To any horizontal surface, for roof terminations.
Above roof line, for roof terminations.
b
a
VENT TERMINAL
MINIMUM
CLEARANCES
GAS METER
Clearance Description
11