14
139435_A GZ
455
DV 8/28/12
A = Clearance above grade, veranda, porch , deck, or balcony
: 12 inches (30 cm) minimum.
B = Clearance to window or door that may be opened:
**Min. 9 inches, U.S. / *12 inches (30 cm) CAN.
We recommend 12 in. minimum to prevent condensation
on the window.
C = Clearance to permanently closed window:
**Min. 9 inches, U.S. / *12 inches (30 cm) CAN
We recommend 12 in. minimum to prevent condensation
on the window.
D = Vertical clearance from the top of the termination to
a ventilated soffit located above the terminal within a
horizontal distance of 2 feet (60 cm) from the center line
of the terminal: 18 inches
(46 cm) minimum.
E = Clearance to unventilated soffit: 12 inches (30 cm)
minimum.
F = Clearance to outside corner: **Min. 9 inches, U.S. /
*12 inches (30 cm) CAN. We strongly recommend 12
inches, particularly where windy conditions prevail.
G = Clearance to inside corner: ** Min. 6 inches, U.S. /
*12 inches (30 cm) CAN. We strongly recommend 12
inches, particularly where windy conditions prevail.
H = *Not to be installed within 15 feet (4.5 m) above a meter/
regulator assembly within 3 feet (90 cm) horizontally from the
center line of the regulator.
I = Clearance to service regulator vent outlet:
3 feet (91 cm) minimum.
J = Clearance to non-mechanical air supply inlet to building or the
combustion air inlet to any other appliance:
12 inches (30 cm) minimum.
K = Clearance to a mechanical air supply inlet:
**Min. 3 feet (91 cm) above if within 10 feet horizontally, U.S. /
*6 feet (1.83 m) minimum / CAN
L =
1
Clearance above paved sidewalk or a paved driveway located
on public property: 7 feet (2.1 m) min.
M = Clearance under veranda, porch, deck, or balcony:
12 inches (30 cm) minimum.
2
N = Clearance to propane tank relief valve and filler connection***:
5 feet (1.52 m) minimum to tanks not filled on site
10 feet (3.05 m) minimum to tanks filled on site from bulk truck.
* In accordance with CSA B149 Installation Codes.
** In accordance with the current ANSI Z223.1/NFPA 54, National
Fuel Gas Code. Note: Local Codes and Regulations may require
different clearances.
1
A vent shall not terminate directly above a sidewalk or driveway
which is located between two single family dwellings and serves
both dwellings.
2
Only permitted if veranda, porch, deck, or balcony, is fully open
on a minimum of two sides beneath the floor.*
Figure 5.2. Horizontal termination clearances.
Figure 5.3
Termination clearance to
overhangs.
NOTE: Clearances must be in accordance with local
installation codes and the requirements of the gas
supplier.
