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VENTING
iNFORMATiON
[]
VENT TERMINAL
(_) AiR SUPPLY iNLET
[]
AREA WHERE TERMINAL
IS NOT PERMITTED
ClearanceLocation
DirectVent(2-pipe)&
DirectVent
ConventionalVent
ConventionalVent(1-pipe)
Furnaces
(2-pipe)Furnaces
(1-pipe)Furnaces
A_
Clearance ab0ve gradel veranda,porch, deck, balcony, or
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B = Clearance to window or door that may be opened.
C = clearance topermanently Closed window
Vertical clearance t o ventilated s offitlocated above the
D= terminal withina horizontal distance of 2feet(61cm) f rom
thecenter lineoftheterminal.
6 inches (15cm)for
6 inches (15cm)for
appliances < 10,000 Btuh (3kW)
appliances < 10,000 Btuh (3kW)
12 inches (30cm)for appliances
9 inches (23cm)for appliances
4 ft. (1.2m) below or to side of opening;
10,000 Btuh- 100,000 Btuh (30kW)
10,000 Btuh- 50,000 Btuh (30kW)
1 ft. (300ram) above opening
36 inches (91cm)br
12 inches (30cm) br
appliances > 100,000 Btuh (30Kw)
appliances > 50,000 Btuh (30Kw)
IE=
Clearance to unventilated SoffiL
F = Clearance to outside corner.
*
*
*
G L Clearance to inside corner:
'
'
'
*
I H
Clearance to each side of center line extended above
3 feet (91cm) within a height 15 feet
meter/regulatorassembly,
above the meter/regulatorassembly
I=
clearance to service iegulator Vent Outlet."
3 feet (1.83m)
'
,
i
,
6 inches (15cm)for
6 inches (15cm)for
appliances < 10,000 Btuh (3kW)
appliances < 10,000 Btuh (3kW)
Clearance to non-mechanicalair supply inlet to building
12 inches (30cm)for appliances
9 inches (23cm)for appliances
4 ft. (1.2m) below or to side of opening;
J=
or the combustion air inlet to any other appliance.
10,000 Btuh- 100,000 Btuh (30kW)
10,000 Btuh- 50,000 Btuh (30kW)
1 ft. (300ram) above opening
36 inches (91cm)for
12 inches (30cm) for
appliances > 100,000 Btuh (30Kw)
appliances > 50,000 Btuh (30Kw)
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3 feet (91pm) above if within
3 ft. (9]crn) above if within
ulea_anceio mecnanlcal air supply Jnie[
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=
"
"
10feet (3m) horizontally
10 feet (3m) horizontally
L
Clearance above paved sidewalk or driveway located on
= public property.
7 feet (2.13m) c
*
7 ft. (2.13m)
,
i
:
d
I
,
I
*
M = C earance under veranda, porch;deck, or ba cony.
12 inches 30cm
NOTES:
a
In accordance with the current CSA B149.1 Natural Gas and Propane InstallationGuide Code
b
In accordance with the current ANSI Z223.1/ NFPA 54 Natural Fuel Gas Code
c
A vent shall not terminate directly above a sidewalkor paved drivewaythat is located betweentwo single family dwellingsand serves both dwellings.
d
Permittedonly if veranda, porch, deck, or balconyis fully open on a minimum of two sides beneaththe floor.
,
For clearances not specified in ANSI Z223.1/ NFPA54 or CSA B149.1, the following statement shall be included: "Clearancein accordance with local installation codes,and the
re uirements of the as su
lier and the manufacturers installation instructions"
Table 15. Vent Termination
Clearances
43
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