Location of Vent Termination

OWNER’S MANUAL

GENERAL VENTING

Continued

When locating vent termination, it is important to observe the minimum clearances shown in Figure 10. You will avoid extra framing by positioning your fireplace against an already existing framing member. The sides of the fireplace may be positioned directly against combustible walls.

*Check with local codes or with the current CAN/CGA B149 [.1 or .2] Installation Codes for Canada or the USA Installations follow the current National Fuel Gas Code, ANS Z223.1, also known as NFPA 54.

E V

B L

	Fixed	V
	Closed	V
	Closed
F	Openable
F	V

Openable Fixed

Closed

V J X

K X

G V A

V TERMINATION CAP

X AIR SUPPLY INLET

GAS METER

RESTRICTED AREA (TERMINATION PROHIBITED)

A= clearance above grade, veranda, porch, deck, or balcony [*12 inches (305mm) minimum]

B= clearance to window or door that may be opened

[12 inches (305mm) minimum]

C = clearance to permanently closed window [minimum 12 inches (305mm) recommended to prevent condensation on window]

D = vertical clearance to ventilated soffit located above the terminal within a horizontal distance of 24 inches (610mm) from the center-line of the terminal [18 inches (457mm) minimum]

E= clearance to unventilated soffit [12 inches (305mm) minimum]

F= clearance to outside corner (see below)

G= clearance to inside corner (see below)

H= *not to be installed above a meter/regulator assembly within

36 inches (914mm) horizontally from the center-line of the regulator

I= clearance to service regulator vent outlet [*72 inches (1829mm) minimum]

J= clearance to non-mechanical air supply inlet to building or the combustion air inlet to any other fireplace [*12 inches (305mm) minimum]

K= clearance to a mechanical air supply inlet [*72 inches (1829mm) minimum]

L= † clearance above paved side-walk or a paved driveway located on public property [*84 inches (2133mm) minimum]

M= clearance under veranda, porch, deck [*12 inches (305mm) minimum ‡]

N= clearance above a roof shall extend a minimum of 24 inches (610mm) above the highest point when it passes through the roof surface and any other obstruction within a horizontal distance of 18 inches (457mm)

†vent shall not terminate directly above a side-walk or paved driveway which is located between two single family dwellings and serves both dwellings*

‡ only permitted if veranda, porch, deck or balconey is fully open on a minimum of 2 sides beneath the floor*

* as specified in CAN/SGA B149 (.1 or .2) Installation Codes (1991) for Canada or for U.S.A. installation follow the current National Fuel Gas Code, ANS Z223.1

Note: Local codes or regulations may require different clearances

Termination Clearances for Buildings with Combustible and Noncombustible Exteriors

Inside Corner

A		A = 6" (152mm)

Outside Corner

B B = 6" (152mm)

Recessed Location

Balcony with No Side Wall

G = Combustible 24" (610mm) Noncombustible 18" (457mm)

Balcony with Perpendicular Side Wall

Combustible &

Noncombustible

H = 24" (610mm)

J = 20" (508mm)

C = Maximum depth of 48" (1219mm) for recessed location

D = Minimum width for back wall of recessed location - Combustible - 38" (965mm) Noncombustible - 24" (610mm)

E = Clearance from corner in recessed location- Combustible - 6" (152mm) Noncombustible - 2" (51mm)

Figure 10 - Minimum Clearances for Vent Terminations

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