Specifications

6
Requirements for Terminating the Venting
WARNING: Venting terminals must not be recessed into a wall or siding.
In addition, the following must be observed:
VENTING
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
† 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 oor.
* For clearances not specied in ANSI Z223. 1 / NFPA 54 or CSA-B149.1, one of the following shall be indicated:
a) A minimum clearance value determined by testing in accordance with section 2.19.6, or;
b) A reference to the following footnote:
“Clearance in accordance with local installation codes and the requirements of the gas supplier”
«Dégagement conforme aux codes d’installation locaux et aux exigences du foumisseunde gaz»
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
D= Vertical clearance to ventilated soft
located above the terminal within a
horizontal distance of 2 feet (61 cm)
from the center line of the terminal
E= Clearance to unventillated soft
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
J= Clearance to nonmechanical
air supply inlet to building or
the combustion air inlet to any
other appliance
K= Clearance to a mechanical air
supply inlet
L= Clearance above paved sidewalk
or paved driveway located on
public property
M= Clearance under veranda, porch
deck, or balcony
12 Inches (30 cm)
6 Inches (15 cm) for appliance < 10,000
Btuh (3 kW), 12 inches (30 cm) for
appliances > 10,000 Btuh (3kW) and <
100,000 Btuh (30 kW), 36 inches (91 cm)
for aplliances > 100,000 Btuh (30 kW)
*
*
*
*
*
3 feet (91 cm) within a height of 15
feet above the meter/ regulator assembly
6 feet (1.83 m)
6 inches (15 cm) for appliances < 10,000
Btuh (3 kW), 12 inches (30 cm) for
appliances > 10,000 Btuh (3 kW) and <
100,000 Btuh (30 kW), 36 inches (91 cm)
for appliances > 100,000 Btuh (30 kW)
6 feet (1.83 m)
7 feet (2.13 m) †
12 inches (30 cm) ‡
12 inches (30 cm)
6 Inches (15 cm) for appliance < 10,000
Btuh (3 kW), 9 inches (23 cm) for
appliances > 10,000 Btuh (3kW) and <
50,000 Btuh (15 kW), 12 inches (30 cm)
for aplliances > 50,000 Btuh (15 kW)
*
*
*
*
*
*
*
6 Inches (15 cm) for appliance < 10,000
Btuh (3 kW), 9 inches (23 cm) for
appliances > 10,000 Btuh (3kW) and <
50,000 Btuh (15 kW), 12 inches (30 cm)
for aplliances > 50,000 Btuh (15 kW)
3 feet (91 cm) above if within 10 feet
(3 m) horizontally
*
*
Canadian Installations
1
US Installations
2