Termination Clearances; Venting Requirements - Natural Vent Only - Vermont Castings 3225 Installation And Operating Manual

Termination Clearances

Termination clearances for buildings with combustible and noncombustible exteriors.
Inside Corner
A =
Combustible
A
Noncombustible
V
Balcony -
with no side wall
G
G =
Combustible &
Noncombustible
12"(305mm)
Fig. 10 Termination clearances.
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Fig. 11 Vent termination window - Natural Vent ONLY.
20004188
Outside Corner
6"(152mm)
V
2"(50mm)
Balcony -
with perpendicular side wall
V
Combustible &
Noncombustible
H = 24"(610mm)
J = 20"(508mm)

Venting Requirements - Natural Vent Only

A
B
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Horizontal Run (in feet)
Radiance Direct Vent /Natural Vent Gas Heater
B =
Combustible
6"(152mm)
Noncombustible
2"(50mm)
B
H
V
J
NOTE: When venting staight vertical, without any
elbow, a minimum of 8 ft. vertical is required
off the top of the stove.
= Acceptable venting configuration
= Unacceptable venting configuration
A: Vertical installations up to 36 feet (12m) in
height. Up to an 18 ft. 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 feet (12m) in
height. Up to a 24 ft. horizontal vent run can be
installed within the vent system using a
maximum of two 45-degree elbows.
(Ratio = 2/3, Hor./Vert.)
NOTE: When using the FSDHAG, the restrictor
plate supplied with the stove is not used.
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Recessed Location
D
C
E
V
C = Maximum depth of 48"
(1219mm) for recessed
location.
D = Minimum width for back wall
of a recessed location.
Combustible 38"(965mm)
Noncombustible 24"(610mm)
E = Clearance from corner in
recessed location.
Combustible 6"(152mm)
Noncombustible 2"(50mm)
Venting Runs
C
584-15
11