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1212
Jefferson Direct Vent/Natural Vent Gas Heater
30004177
Fig. 10 Termination clearances.
Outside Corner
Inside Corner
Termination Clearances
Termination clearances for buildings with combustible and noncombustible exteriors.
G =
Combustible
6" (152 mm)
Noncombustible
2" (51 mm)
F =
Combustible
6" (152 mm)
Noncombustible
2" (51 mm)
G
Balcony -
with no side wall
M =
Combustible &
Noncombustible
12" (305 mm)
M
Balcony -
with perpendicular side wall
M = 24" (610 mm)
P = 20” (508 mm)
M
F
Alcove Applications*
C
D
C
E
V
V
Combustible &
Noncombustible
V
V
V
E = Min. 6” (152 mm) for
non-vinyl sidewalls
Min. 12” (305 mm) for
vinyl sidewalls
O = 8’ (2.4 m) Min.
O
P
584-15
No.
of Caps D
Min.
C
Max.
1 3’ (914 mm) 2 x D
Actual
2 6’ (1.8 m) 1 x D
Actual
3 9’ (2.7 m) 2/3 x D
Actual
4 12’ (3.7 m) 1/2 x D
Actual
D
Min.
= # of Termination caps x 3
C
Max.
= (2 / # termination caps) x D
Actual
*NOTE: Termination in an alcove space (spaces open only on one side and with an overhang) is permitted with the dimensions
specified for vinyl or non-vinyl siding and soffits. 1. There must be a 3’ (914 mm) minimum between termination caps. 2. All
mechanical air intakes within 10’ (1 m) of a termination cap must be a minimum of 3’ (914 mm) below the termination cap. 3. All
gravity air intakes within 3’ (914 mm) of a termination cap must be a minimum of 1’ (305 mm) below the termination cap.
FP567
NVBR/NVBC VENTING RUNS
11/12/97
Venting Runs
Horizontal Run (in feet)
Vertical Run (in feet)
(Measured from floor of unit to
top of vent cap.)
A: Vertical installations up to 36' (12m) in
height. Up to an 18' horizontal vent run can be
installed within the vent system using a
maximum of two 90-degree elbows or four
45-degree elbows.
B: Vertical installations up to 36' (12m) in
height. Up to a 24' horizontal vent run can be
installed within the vent system using a
maximum of two 45-degree elbows.
(Ratio = 2/3, Hor./Vert.)
= Acceptable venting configuration
= Unacceptable venting configuration
36
34
32
30
28
26
24
22
20
18
16
14
12
10
8
16 18 20 22 24 26 28 30 32 34 36
4 6 8 10 12 14
A
B
Venting Requirements - Natural Vent Only
Fig. 11 Vent termination window - Natural Vent ONLY.
NOTE: When using the FSDHAG, the restrictor
plate supplied with the stove is not used.
FP567b