11
Outdoor Lifestyles by Hearth & Home Technologies • Twilight-II-B Installation Manual • 2108-970 Rev. H • 5/14
Figure 4.3 Minimum Clearances for Termination
FP
= APPLIANCE OPENING
X
= AIR SUPPLY INLET
= AREA WHERE APPLIANCE IS NOT PERMITTED
A. Chimney Diagram
4
4
Termination Location and Vent Information
Q
MIN
R
MAX
TWILIGHT-II-B
10 feet
2 x Q
ACTUAL
1 additional terminations
Q + 3 feet
1 x Q
ACTUAL
2 additional terminations
Q + 6 feet
2/3 x Q
ACTUAL
3 additional terminations
Q + 9 feet
1/2 x Q
ACTUAL
R
MAX
= (2 / # caps plus appliance) x Q
ACTUAL
O
N
P
R
Q
FP
A = 0 inches...................clearances above grade, veranda,
porch, deck or balcony
B =
12 inches.................clearance to window or door that
may be opened, or to permanently
closed window
C
= 35-5/16 inches ........clearance below unventilated sof
fi
t
35-5/16 inches ........clearance below ventilated sof
fi
t
64-5/16 inches ........clearance below vinyl sof
fi
ts and
electrical service
D
= 9 inches...................clearance to outside corner
E
= 12 inches.................clearance to inside corner
F
= 3 ft. (Canada) ..........not to be installed above a gas me-
ter/regulator assembly within 3 feet
horizontally from the center-line of
the regulator
G
= 3 ft ...........................clearance to gas service regulator
vent outlet
H
= 9 inches (U.S.A)
12 inches (Canada) .clearance to non-mechanical (un-
powered) air supply inlet, combus-
tion air inlet or direct-vent termina-
tion
i
= 3 ft. (U.S.A.)
6 ft. (Canada) ...........clearance to a mechanical (pow-
ered) air supply inlet
All mechanical air intakes within 10 feet of a termination cap
must be a minimum of 3 feet below termination.
J =
54
in.
......................
On
public
property: clearance
above paved sidewalk or a paved
driveway.
A vent shall not terminate directly above a sidewalk or paved
driveway which is located between two single family dwellings
and serves both dwellings.
Electrical
Service
V
K
V
K
V
L
C
V
N
= 6 inches ........... non-vinyl sidewalls
12 inches ......... vinyl sidewalls
O =
18 inches ......... non-vinyl sof
fi
t and overhang
42 inches ......... vinyl sof
fi
t and overhang
P =
8
ft.
Covered Alcove Applications
(Spaces open only on one side and with an overhang)
CAUTION! Risk of Burns!
Terminations are HOT, consider
proximity to doors, traf
fi
c areas or where people may
pass or
gather (sidewalk, deck, patio, etc.)
.
• Local codes or regulations may require different clearances.
• Vent system termination is permitted in porch areas with
two or more sides open.
• Hearth & Home Technologies assumes no responsibility
for the improper performance of the appliance when the
venting system does not meet these requirements.
• Vinyl protection kits are suggested for use with vinyl siding.
M = 35-5/16 inches ............clearance under veranda, porch, deck,
balcony or overhang
64-5/16 inches .......vinyl or composite overhang
Permitted when veranda, porch, deck or balcony is fully open
on a minimum of 2 sides beneath the
fl
oor.
K
= 6 inches................. clearance from sides of electrical
service
L =
12
inches................
clearance above electrical service
Location of the vent termination must not interfere with access to the
electrical service.
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
This appliance is approved for installation onto screened porches
with the following guidelines:
NOTE:
There may be some odor and small amounts of soot
associated with venting the TWILIGHT-II-MOD onto a screened
porch. Ensuring good cross draft ventilation and routine maintenance
of the appliance will maximize comfort and cleanliness.
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
