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4
4
Termination Locations
A. Appliance Opening Minimum Clearances
Fire Risk.
Explosion Risk.
Maintain vent termination minimum clearances as specifi ed.
D
E
B
L
F
A
= 0" ...........................clearances above grade, veran-
(See Note 1)
B*
= 12" .........................clearances to window or door
D
=.................................vertical clearance to ventilated
35-5/16"
(non-vinyl)
64-5/16"
(vinyl)
E
=
35-5/16"
(non-vinyl)
64-5/16"
(vinyl)
F
= 9" ..........................clearance to outside corner
G*
= 12" .........................clearance to inside corner
H
= 3 ft. (Canada) ........not to be installed above a gas me-
I
= 3 ft. ........................clearance to service regulator vent
*
36" minimum for vinyl windows or vinyl siding.
**
a appliance shall not open directly above a sidewalk or paved
driveway which is located between two single family dwellings
and serves both dwellings.
*** only permitted if veranda, porch, deck or balcony is fully open on
a minimum of 2 sides beneath the fl oor, or if the screened porch
guidelines are followed.
NOTE 1: Local codes or regulations may require different clearances.
NOTE 2: Termination in an alcove space (spaces open only on one side
and with an overhang) are permitted with the dimensions specifi ed for
vinyl or non-vinyl siding and soffi ts. 1. There must be 3 feet minimum
between terminations or between the appliance and termination. 2.
All mechanical air intakes within 10 feet of a termination must be a
minimum of 3 feet below the appliance hood. 3. All gravity air intakes
within 3 feet of the appliance hood must be a minimum of 1 foot below
the termination.
Figure 4.1 Minimum Clearances for Appliance Opening
10
WARNING
FP
A
B
FP
B
FP
FP
FP
A
da, porch, deck or balcony
that may be opened, or to per-
manently closed window.
soffi t located above the hood
within a horizontal distance of 2
feet (60 cm) from the center-line
of the hood
.. .clearance to unventilated soffi t
ter/regulator assembly within 3 feet
(90cm) horizontally from the center-
line of the regulator
outlet and electric service
Heat & Glo LifeStyle Collection • Twilight-II-B • 2108-900 Rev. E • 11/06
= AREA WHERE APPLIANCE IS NOT PERMITTED
G
X
= AIR SUPPLY INLET
H
FP
= APPLIANCE OPENING
M
I
FP
J
= 9" (U.S.A.)
12" (Canada) ...........clearance to non-mechani-
K
= 3 ft. (U.S.A.)
6 ft. (Canada) ...........clearance to a mechanical
L** = 54" ...........................clearance above paved side-
(See Note 1)
M*** = 35-5/16"...................clearance under veranda,
64-5/16" ..................vinyl
N
= 12" ..........................non-vinyl siding
36" ..........................vinyl siding
P
= 8 ft.
Twilight-II-B
1 additional termination cap
2 additional termination caps
3 additional termination caps
This appliance is approved for installation onto screened porches
with the following guidelines:
Minimum porch area: 96 square feet
Minimum ceiling height: 92 inches
Minimum two walls must be screened
Minimum top of screen height, side walls: 6 ft. 8 in.
Minimum screen area: 64 square feet
NOTE: There may be some odor and small amounts of soot
associated with venting the Twilight-II-B onto a screened porch.
Ensuring good cross draft ventilation and routine maintenance of
the appliance will maximize comfort and cleanliness.
P
R
Q
X
(See Note 2)
J or K
cal air supply inlet to building
or the combustion air inlet to
any other appliance
air supply inlet
walk or a paved driveway lo-
cated on public property
porch, deck, balcony or over-
hang
Q
MIN
10 feet
Q + 3 feet
Q + 6 feet
Q + 9 feet
R
= (2 / # caps plus appliance) x Q
MAX
ACTUAL
M
N
FP
R
MAX
2 x Q
ACTUAL
1 x Q
ACTUAL
2/3 x Q
ACTUAL
1/2 x Q
ACTUAL
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