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LENNOX HEARTH PRODUCTS • MONTEBELLO
* See Item D in the Text Below.
Center Line
Exterior Wall
of Termination
24 in.
*18"
Horizontal
Termination
18"
36 in.
Inside Corner
DETAIL D
B
V
L
V
F
V
= Air Supply Inlet
X
Figure 4: Exterior Horizontal Vent Termination Clearance Requirements
Minimum Clearances
Clearance above grade, veranda, porch, deck
A
or balcony.
B
Clearance to window or door that may be opened.
C
Clearance to permanently closed window
Vertical clearance to ventilated soffit located above
D
the terminal within a horizontal distance of 36 in.
(91.4cm) from the center line of the terminal
E
Clearance to unventilated soffit
F
Clearance to outside corner
G
Clearance to inside corner
Clearance to each inside of center line extended
H
above meter / regulator assembly
I
Clearance to service regulator vent outlet
Clearance to non-mechanical air supply inlet to
J
building or the combustion air inlet to any other
appliance
K
Clearance to mechanical air supply inlet
Clearance above paved sidewalk or paved
L
driveway located on public property
M
Clearance under veranda, porch, deck or balcony
Table 5: Exterior Horizontal Vent Termination Clearance Requirements
* In accordance with the current CAN/CGA-B149.1 National Gas and B149.2 Propane Installation Code—Latest Editions.
** In accordance with the current ANSI Z223.1 / NFPA 54 National Fuel Gas Code—Latest Edition.
‡ A vent shall not terminate 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 2 sides beneath the floor.
DLX POWER VENT DV GAS FIREPLACES (MDLX40/45IN-PV) • INSTALLATION INSTRUCTIONS
®
Corner Detail
V
Ventilated Soffit
A
B
C
V
Fixed
Operable
V
Closed
Window
Window
C
B
C
C
B
A
= Vent Terminal
= Area where Terminal is NOT permitted
V
Canadian Installation *
12 in. (30 cm) *
6 in. (15.2 cm) for appliances < 10,000 BTU/hr (3kW),
12 in. (30 cm) for appliances > 10,000 BTU/hr (3kW)
and < 100,000 BTU/hr (30kW),
36 in. (91 cm) for appliances > 100,000 BTU/hr
(30kW)*
12 in. (305 mm) recommended to prevent
window condensation
24 in. (61.0 cm)
24 in. (61.0 cm)
5 in. (12.7 cm)
36 in. (91.4 cm)
3 ft (91 cm) within a height of 15 ft above the meter /
regulator assembly *
3 ft (91 cm) *
6 in. (15.2 cm) for appliances < 10,000 BTU/hr (3kW),
12 in. (30 cm) for appliances > 10,000 BTU/hr (3kW)
and < 100,000 BTU/hr (30kW),
36 in. (91 cm) for appliances > 100,000 BTU/hr
(30kW)*
6 ft (1.83 m) *
7 ft (2.13 m) ‡
18 in. (46.0 cm) * ‡
NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.
NOTE: Local Codes Or Regulations May Require
Different Clearances.
Inside
NOTE: Location Of The Vent Termination Must Not
Interfere With Access To The Electrical Service.
G
= 9 in. in U.S.
A
=12 in. in Canada
3 ft.
X
A
A
3 ft.
J
B
H
M
V
I
K
US Installation **
12 in. (30 cm) **
6 in. (15.2 cm) for appliances < 10,000 BTU/hr (3kW),
9 in. (23 cm) for appliances > 10,000 BTU/hr (3kW)
and < 50,000 BTU/hr (15kW),
12 in. (30 cm) for appliances > 50,000 BTU/hr
(15kW)*
9 in. (229 mm) recommended to prevent
window condensation
24 in. (61.0 cm)
24 in. (61.0 cm)
5 in. (12.7 cm)
24 in. (61.0 cm)
3 ft (91 cm) within a height of 15 ft above the meter /
regulator assembly **
3 ft (91 cm) **
6 in. (15.2 cm) for appliances < 10,000 BTU/hr (3kW),
9 in. (23 cm) for appliances > 10,000 BTU/hr (3kW)
and < 50,000 BTU/hr (15kW),
12 in. (30 cm) for appliances > 50,000 BTU/hr
(15kW)*
3 ft (91 cm) above, if within 10 ft (3 m) horizontally**
7 ft (2.13 m) ‡
18 in. (46.0 cm) ** ‡
E
D
V
X
7
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