Horizontal Vent Termination Locations - Lennox Hearth Products VISION Elite SDVSS-25 Installation And Operation Manual

Exterior Horizontal Vent Termination Clearance Requirements
* See Item D in the Text Below.
Exterior Wall
of Termination
*18"
Horizontal
Termination
18"
Inside Corner
DETAIL D
B
V
L
F
V
= Air Supply Inlet
X
Minimum Clearances
A = Clearance above grade, veranda, porch, deck
or balcony.
B = Clearance to window or door that may be opened.
C = Clearance to permanently closed window
D = Vertical clearance to ventilated soffit located
above the terminal within a horizontal distance of
18 in. (458 mm) from the center line of the terminal
E = Clearance to unventilated soffit
F = Clearance to outside corner
G = Clearance to inside corner
H = Clearance to each inside of center line extended
above meter / regulator assembly
I = Clearance to service regulator vent outlet
J = Clearance to non­mechanical air supply inlet
to building or the combustion air inlet to any other
appliance
K = Clearance to mechanical air supply inlet
L = Clearance above paved sidewalk or paved
driveway located on public property
M = Clearance under veranda, porch, deck or
balcony
* In accordance with the current CSA­B149.1 National Gas and B149.2 Propane Installation Code ­ Latest Editions.
** In accordance with the current ANSI Z223.1 / NFPA 54 National Fuel Codes ­ 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.
Figure 21
Center Line
Corner Detail
V
Ventilated Soffit
A
B
C
V
Fixed
Operable
V
Closed
Window
Window
V
C
B
C
B
C
A
= Vent Terminal = Area where Terminal is NOT permitted
V
Canadian Installation *
12 inches (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 inches (91 cm) for appliances
> 100,000 BTU/hr (30kW)*
12 inches (305 mm) recommended to prevent window
condensation
18 inches (458 mm)
12 inches (30 cm)
5 inches (12.7 cm)
6 in. (15 cm)
3 feet (91 cm) within a height of 15 feet above the meter /
regulator assembly *
3 feet (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 inches (91 cm) for appliances
> 100,000 BTU/hr (30kW)*
6 feet (1.8 meters) *
7 feet (2.13 m) ‡
12 in. (30 cm) * ‡
NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.
Inside
G
= 9" in U.S.
A
= 12" in Canada
3 ft.
X
A A
3 ft.
J
B
H
M
V
I
US Installation **
12 inches (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 inches (30 cm) for appliances
> 50,000 BTU/hr (15kW)*
9 inches (229 mm) recommended to prevent window
condensation
18 inches (458 mm)
12 inches (30 cm)
5 inches (12.7 cm)
6 in. (15 cm)
3 feet (91 cm) within a height of 15 feet above the meter
/ regulator assembly **
3 feet (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 inches (30 cm) for appliances
> 50,000 BTU/hr (15kW)*
3 feet (91 cm) above, if within 10 feet (3 m) horizontally**
7 feet (2.13 m) ‡
12 in. (30 cm) ** ‡
D E
V
X
K
17