25
iN401 - iN501 Air
Intake
Inlet
and
Exhaust
Gas
Outlet
Pipe
Connections
May
2019
-
Revision
00
7.7 Venting Clearance Specifications
IQ-010
B
K
F
B
J
G
D
E
B
Fixed
Closed
Fixed
Closed
Operable
Gas Meter/Regulator
B
B
V
V
V
V
I
V
V
V
V
V
X
X
B
C
H
L
A
A
M
Operable
Inside Corner
Detail
Air Inside Inlet
Vent Terminal
Area Where Terminal is Not Permitted
V
X
Venting Clearance Specifications
Item
Description
Clearance Distance
USA
1
Canada
2
A
Clearances above grade, veranda, porch, deck, or balcony
1 foot
1 foot
B
Clearances to window or door that may be opened
1 foot**
3 feet
C
Clearances to permanently closed window
*
*
D
Vertical clearance to a ventilated soffit, eves, or overhang
*
*
E
Clearances to unventilated soffit, eves, or overhang
*
*
F
Clearances to outside corner
*
*
G
Clearances to inside corner
*
*
H
Clearances to each side of centerline extended from meter/regulator
*
3 feet within a height
15 feet above meter/
regulator assembly
I
Clearances to gas meter regulator vent outlet
*
3 feet
J
Clearances to non-mechanical air supply inlet or combustion air inlet to any other appliance
1 foot**
3 feet
K
Clearances to mechanical air supply inlet
3 feet above if within
10 feet horizontally
6 feet
L
Clearances to above paved sidewalk or paved driveway on public property
*
7 feet
M
Clearances under veranda, porch, deck, or balcony
*
1 foot
*Per local/gas supplier codes. Use clearances in accordance with local building codes and local gas supplier.
** For single vent pipe/direct 4 feet (1.2 m) below or to the side of opening and 1 foot above opening.
1
In accordance with Z223.1
2
In
accordance
with
CSA
B149.1
Note:
The vent for this appliance shall not terminate:
Over public walkways; or
Near soffit vents or crawl space vents or other areas where condensate or
vapor could create a nuisance or hazard or cause property damage; or
Where condensate vapor could cause damage or could be detrimental to the
operation of regulators, relief valves, or other equipment.
