Minimum Clearances - Lennox RAVELLE 30 Installation And Operation Instructions Manual

Exterior Horizontal Vent Termination Clearance Requirements
* See Item D in the Text Below.
Center Line
Exterior Wall
of Termination
*18"
Horizontal
Termination
18"
Inside Corner
DETAIL D
B
V
L
V
F
V
A
= 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 . 6 in . (15 . 2 cm) for appliances < 10,000 BTU/hr (3kW),
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 non-mechanical 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 CSA-B149 .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 22
Inside
Corner Detail
G
V
Ventilated Soffit
A
B
C
V
Fixed
Operable
V
Closed
Window
Window
C
B
C
B
C
= Vent Terminal = Area where Terminal is NOT permitted
V
Canadian Installation *
12 inches (30 cm) *
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 . 1 3 m) ‡
12 in . (30 cm) * ‡
NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.
= 9" in U.S.
A
= 12" in Canada
3 ft.
X
A A
3 ft.
J
B
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 . 1 3 m) ‡
12 in . (30 cm) ** ‡
H
D E
V
M
V X
I
K
US Installation **
23