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Value Series Manual 7
[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] Permied only if veranda, porch, deck, or balcony is fully open on a
minimum of two sides beneath the oor.
For clearances not specied in ANSI Z223.1/NFPA 54, clearances are in
accordance with local installaon codes and the requirements of the gas
supplier.
Clearance to opposite wall is 24 inches (60 cm).
For indoor models, you must install a vent terminaon to bring in combuson air and expel exhaust.
Direct Vent (Indoor Unit) Other than direct vent (Outdoor unit)
Ref Descripon
Canadian Installaons (CSA
B149.1)
US Installaons
(ANSI Z223.1 / NFPA 54)
Canadian Installaons
(CSA B149.1)
US Installaons
(ANSI Z223.1 / NFPA 54)
A
Clearance above grade, veranda, porch, deck, or
balcony
12 inches (30 cm) 12 inches (30 cm) 12 inches (30 cm) 12 inches (30 cm)
B Clearance to window or door that may be opened 36 inches (91 cm) 12 inches (30 cm)
6 in (15 cm) for appliances ≤
10,000 Btuh (3 kW), 12 in (30
cm) for appliances > 10,000 Btuh
(3 kW) and ≤ 100,000 Btuh (30
kW), 36 in (91 cm) for appliances
>100,000 Btuh (30 kW)
4 (1.2 m) below or to side
of opening; 1 (300 mm)
above opening
C Clearance to permanently closed window * * * *
D
Vercal clearance to venlated sot, located
above the terminal within a horizontal distance of
2 feet (61 cm) from the center line of the terminal
* * * *
E Clearance to unvenlated sot * * * *
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
Above a regulator within 3
(91cm) horizontally of the
vercal center line of the
regulator vent outlet to a
maximum vercal distance of 15
(4.5 m)
*
Above a regulator within 3
(91cm) horizontally of the
vercal center line of the
regulator vent outlet to a
maximum vercal distance of 15
(4.5 m)
*
J
Clearance to nonmechanical air supply inlet to
building or the combuson air inlet to any other
appliance
36 inches (91 cm) 12 inches (30 cm)
6 in (15 cm) for appliances ≤
10,000 Btuh (3 kW), 12 in (30
cm) for appliances > 10,000 Btuh
(3 kW) and ≤ 100,000 Btuh (30
kW), 36 in (91 cm) for appliances
>100,000 Btuh (30 kW)
4 (1.2 m) below or to side
of opening; 1 (300 mm)
above opening
K Clearance to a mechanical air supply inlet 6 feet (1.83 m)
3 feet (91 cm) above if
within 10 feet (3 m)
horizontally
6 feet (1.83 m)
3 feet (91 cm) above if
within 10 feet (3 m)
horizontally
L
Clearance above paved sidewalk or paved
driveway located on public property
7 feet (2.13 m) * 7 feet (2.13 m) *
M Clearance under veranda, porch, deck, or balcony 12 inches (30 cm) * 12 inches (30 cm) *
Terminal Clearances
AIR SUPPLY INLET
VENT TERMINAL
AREA WHERE TERMINAL IS NOT PERMITTTED
X
V
SNOW
TERMINATION
Clearance in
Ref. A also
applies to
anticipated
snow line
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