ICP C8MPN - Page 15

A
X
B
V
V
V
V
X
X
AIR SUPPLY INLET
V
VENT TERMINAL
AREA WHERE TERMINAL IS NOT PERMITED
A
B
B
B
B
B
C
D
E
F
J
I
L
H
M
K
G
25--24--65--2
N
V
Other than Direct Vent Termination Clearance
Figure 10
V
V
15
441 01 2611 06
Item Clearance Descriptions Canadian Installation (1)
U.S. Installation (2)
A Clearance above grade, veranda, porch, deck, balcony,or
anticipated snow level
12² (30cm) # 12² (30 cm)
B Clearance to a window or door that may be opened 6² (15 cm) for appliances £ 10,000 BTUH (3kW), 12² (30
cm) for appliances > 10,000 Btuh (3 kW) and £ 100,000 Btuh
(30kW), 36² (91 cm) for appliances > 100,000 Btuh (30 kW)
4¢ (1.2 m) below or to the side of the opening. 1¢ (30cm)
above the opening.
C Clearance to a permanently closed window
* *
D Vertical clearance to a ventilated soffit located above the ter-
minal within a horizontal distance of 2¢ (61cm) from the cent-
erline of the terminal
* *
E Clearance to an unventilated soffit
* *
F Clearance to an outside corner
* *
G Clearance to an inside corner
* *
H Clearance to each side of the centerline extended above elec-
trical meter or gas service regulator assembly
3¢ (91cm) within15¢ (4.5 m) above the meter/regulator
assembly
3¢ (91cm) within15¢ (4.5 m) above the meter/regulator
assembly
I Clearance to service regulator vent outlet 3¢ (91cm)
*
J Clearance to non--mechanical air supply inlet to building or the
combustion air inlet toany other appliance
6² (15 cm) for appliances £ 10,000 BTUH (3kW), 12² (30
cm) for appliances > 10,000 Btuh (3 kW) and £ 100,000 Btuh
(30kW), 36² (91 cm) for appliances > 100,000 Btuh (30 kW)
4¢ (1.2 m) below or to the side of opening: 1¢ (30 cm) above
opening.
K Clearance to a mechanical air supply inlet 6¢ (1.83m) 3¢ (91 cm) above if within 10¢ (3m horizontally)
L Clearance under a veranda, porch, deck, or balcony 12² (30cm) +
*
M Clearance to each side of the centerline extended above or
below vent terminal of the furnace to a dryer or water heater
vent, or other appliance’s direct vent intake or exhaust.
* *
N Clearance from a plumbing vent stack 3¢ (91cm) 3¢ (91cm)
(1.) In accordance with the current CSA B149.1, Natural Gas and Propane Installation Code
(2.) In accordance with the current ANSI Z223.1/NFP A54, National Fuel Gas Code
#18² (46 cm) above roof surface
+ Permitted only if veranda, porch, deck, or balcony is fully open on a minimum of two sides beneath the floor .
* For clearances not specified in ANSI Z223.1/NFPA54 or CSA B149.1, clearances shall be in accordance with local installation codes and the requirements of the gas supplier and the manufacture’s
installation instructions.
Notes:
1. The vent for this appliance shall not terminate
a. Over public walkways; or
b. Near soffit vents or crawl space vents or other areas where condensate or vapor could create a nusiance or hazard or property damage; or
c. Where condensate vapor could cause damage or could be detrimental to the operation of regulators, relief valves, or other equipment.
2. Whenlocatingventterminations,considerationmust be givento prevailingwinds,location, andotherc onditions which may cause recirculation of the combustiob products of adjacent vents.
Recirculation can cause poor combustion, inlet condensate problems, and accelerated corrosion of the heat exchangers.