Table of Contents
Advertisement
Direct Vent Terminal Clearances
A vent termination must be installed to bring in combustion air and expel exhaust to the outside.
TERMINATION
SNOW
Ref
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 soffit, located above the terminal within a
E
Clearance to unventilated soffit
F
Clearance to outside corner
G
Clearance to inside corner
Clearance to each side of center line extended above meter/regulator
H
assembly
I
Clearance to service regulator vent outlet
Clearance to nonmechanical air supply inlet to building or the combustion air
J
inlet to any other appliance
K
Clearance to a mechanical air supply inlet
Clearance above paved sidewalk or paved driveway located on public
L
property
M
Clearance under veranda, porch, deck, or balcony
[1] A vent shall not terminate directly above a sidewalk or paved driveway
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.
16
Clearance in
Ref. A also
applies to
anticipated
snow line
Description
V
Canadian Installations
12 inches (30 cm)
36 inches (91 cm)
Above a regulator within 3 ft (91cm)
horizontally of the vertical center line of
the regulator vent outlet to a maximum
vertical distance of 15 ft (4.5 m)
36 inches (91 cm)
6 feet (1.83 m)
7 feet (2.13 m)
12 inches (30 cm)
For clearances not specified in ANSI Z223.1/NFPA 54, clearances are in
accordance with local installation codes and the requirements of the gas
supplier.
Clearance to opposite wall is 24 inches (60 cm).
Demand Duo™ 80
AIR SUPPLY INLET
VENT TERMINAL
AREA WHERE TERMINAL IS NOT PERMITTTED
*
*
*
*
*
*
3 feet (91 cm) above if within
10 feet (3 m) horizontally
US Installations
12 inches (30 cm)
12 inches (30 cm)
*
*
*
*
*
*
*
12 inches (30 cm)
*
*
Advertisement
Table of Contents
