Outdoor Lifestyles by Hearth & Home Technologies • TWILIGHT-II-MDC Installation Manual • 2369-970 Rev. L • 8/19
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4
Termination Location and Vent Information
Figure 4.1 Minimum Clearances for Termination
X
= AIR SUPPLY INLET
FP
= FIREPLACE
= AREA WHERE TERMINAL IS NOT PERMITTED
Vertical distances measured from top of hood. Horizontal distances measured from side of hood.
U.S.A.
CANADA
A
Clearance above grade,veranda, porch, deck, or balcony
0 in. (0 mm)
0 in. (0 mm)
B
Clearance to window or door that may be opened, or to permanently closed window
U.S.A.: = 12 in. min. (305 mm min.) CANADA: = 12 in. min. (305 mm min.)
C
clearance below unventilated soffit
35-5/16 in.
(897 mm)
35-5/16 in.
(897 mm)
clearance below ventilated soffit
35-5/16 in.
(897 mm)
35-5/16 in.
(897 mm)
clearance below any vinyl soffits and electrical service
64-5/16 in. (1.6 m) 64-5/16 in. (1.6 m)
D
clearance to outside corner
9 in. (229 mm)
9 in. (229 mm)
E
clearance to inside corner
12 in. (305 mm)
12 in. (305 mm)
F
not to be installed above a gas meter/regulator assembly within 3 feet horizontally from
the center-line of the regulator
3 ft (914 mm)
3 ft (914 mm)
G
clearance to gas service regulator vent outlet
3 ft (914 mm)
3 ft (914 mm)
H
clearance to non-mechanical air supply inlet to building or the combustion air inlet to
any other appliance termination (mechanical or non-mechanical)
9 in. min.
(229 mm min.)
12 in. min.
(305 mm min.)
I
clearance to a mechanical (powered) air supply inlet
***(All mechanical air intakes within 10 feet of a horizontal termination cap must be
a minimum of 3 feet below termination.)
3 ft (914 mm)***
6 ft (1.8 3m)
J
On
public
property: clearance above paved sidewalk or a paved driveway.
54 in. (1.3 m)
54 in. (1.3 m)**
**(A vent shall not terminate directly above a sidewalk or paved driveway which is located between two single family dwellings
and serves both dwellings.)
K
clearance from sides of electrical service
6 in. (152 mm)
6 in. (152 mm)
Location of the vent termination must not interfere with access to the electrical service.
L
clearance above electrical service
12 in. (305 mm)
12 in. (305 mm)
Location of the vent termination must not interfere with access to the electrical service.
M
clearance under veranda, porch, deck, balcony or overhang
*(Permitted only if veranda, porch, deck, or balcony is fuly open on a minimum of two
sides beneath the floor.)
Note:
See Section 2.A “Design and Installation Considerations.
36 in.
(914 mm)
36 in.
(914 mm)*
vinyl or composite overhang
64-5/16 in. (1.6 m) 64-5/16 in. (1.6 m)
U.S.A. Installations:
In accordance with the current ANSI Z223.1/NFPA 54, National Fuel Gas Code.
Canadian Installations:
In accordance with the current CSA B149.1, Natural Gas and Propane Installation Code.
Electrical
Service
K
FP
K
L
C
FP
FP
FP
A. Vent Terminal Clearances
C
J
B
D
B
F
B
A
E
FP
M
H or i
G
X
H
A
H
FP
FP
FP
FP
FP
FP
FP
FP
FP
