13
W415-0788 / 05.15.09
2.5 VENT TERMINAL CLEARANCES
INSTALLATIONS
CANADA
U.S.A.
A
12”
12”
Clearance above grade, veranda porch, deck or balcony.
B
12”
9”
Clearance to windows or doors that open.
C
12” *
12” *
Clearance to permanently closed windows.
D
18” **
18” **
Vertical clearance to ventilated soffi ts located above the terminal within a horizontal distance of 2’ from
the centerline of the terminal.
E
12” **
12” **
Clearance to unventilated soffi t.
F
0”
0”
Clearance to an outside corner wall.
G
0” ***
0” ***
Clearance to an inside
non
-combustible corner wall or protruding
non
-combustible obstructions (chimney, etc.).
2” ***
2” ***
Clearance to an inside combustible corner wall or protruding combustible obstructions (vent chase, etc.).
H
3’
3’ ****
Clearance to each side of the centerline extended above the meter / regulator assembly to a maximum
vertical distance of 15’.
I
3’
3’ ****
Clearance to a service regulator vent outlet.
J
12”
9”
Clearance to a non-mechanical air supply inlet to the building or a combustion air inlet to any other appliance.
K
6’
3’ †
Clearance to a mechanical air supply inlet.
L
7’ ‡
7’ ****
Clearance above a paved sidewalk or paved driveway located on public property.
M
12” ††
12” ****
Clearance under a veranda, porch, deck or balcony.
N
16”
16”
Clearance above the roof.
O
2’ †*
2’ †*
Clearance from an adjacent wall including neighbouring buildings.
*
Recommended to prevent condensation on windows and thermal breakage
**
it is recommended to use a heat shield and to maximize the distance to vinyl clad soffi ts.
***
The periscope requires a minimum 18 inches clearance from an inside corner.
****
This is a recommended distance. For additional requirements check local codes.
†
3 feet above if within 10 feet horizontally.
‡
A vent shall not terminate directly above a sidewalk or paved driveway that is located between two single family dwellings and serves both dwellings.
††
Permitted only if the veranda, porch, or deck is fully open on a minimum of two sides beneath the fl oor.
†*
Recommended to prevent recirculation of exhaust products. For additional requirements check local codes.
12.1
NOTE: Clearances are in accordance with local installation codes and the requirements of the gas supplier.
NorthlineExpress.com
http://www.northlineexpress.com
Toll-Free 1-866-667-8454
