Vent Terminal Clearances - Majestic MARQ36IN-B Installation Manual

C. Vent Terminal Clearances
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U.S.A. Installations: In accordance with the current ANSI Z223.1/NFPA 54, National Fuel Gas Code.
Canadian Installations: In accordance with the current CSA B149.1, Natural Gas and Propane Installation Code.
A Clearance above grade,veranda, porch, deck, or balcony
B Clearance to window or door that may be opened, or to permanently closed window
Clearance below unventilated soffit
Clearance below ventilated soffit
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Clearance below any vinyl soffits and electrical service
D Clearance to outside corner
E Clearance to inside corner
Not to be installed above a gas meter/regulator assembly within 3 feet horizontally from
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the center-line of the regulator
G Clearance to gas service regulator vent outlet
Clearance to non-mechanical air supply inlet to building or the combustion air inlet to
H
any other appliance termination (mechanical or non-mechanical)
Clearance to a mechanical (powered) air supply inlet
I ***(All mechanical air intakes within 10 feet of a horizontal termination cap must be
a minimum of 3 feet below termination.)
On public property: clearance above paved sidewalk or a paved driveway.
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**(A vent shall not terminate directly above a sidewalk or paved driveway which is located between two single family dwellings
and serves both dwellings.)
Clearance from sides of electrical service
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Location of the vent termination must not interfere with access to the electrical service.
Clearance above electrical service
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Location of the vent termination must not interfere with access to the electrical service.
Clearance under veranda, porch, deck, balcony or overhang
*(Permitted only if veranda, porch, deck, or balcony is fully open on a minimum of
M two sides beneath the floor.)
Vinyl or composite overhang
Figure 4.4 Minimum Clearances for Termination
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B
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G
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A
Majestic MARQ36IN-B, MARQ42IN-B Installation Manual • 2614-980 Rev. D • 4/19
= AREA WHERE TERMINAL IS NOT PERMITTED
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= AIR SUPPLY INLET
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= VENT TERMINAL
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Electrical
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Service
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A
U.S.A.
12 in. (305 mm) 12 in. (305 mm)
12 in. (305 mm) 112 in. (305 mm)
18 in. (457 mm) 18 in. (457 mm)
18 in. (457 mm) 18 in. (457 mm)
42 in. (1067 mm) 42 in. (1067 mm)
6 in. (152 mm) 6 in. (152 mm)
6 in. (152 mm) 6 in. (152 mm)
3 ft (914 mm) 3 ft (914 mm)
3 ft (914 mm) 3 ft (914 mm)
12 in. (305 mm) 12 in. (305 mm)
3 ft (914 mm)*** 6 ft (1.7 mm)
7 ft (2.1 m) 7 ft (2.1 m)**
6 in. (152 mm) 6 in. (152 mm)
12 in. (305 mm) 12 in. (305 mm)
24 in. (610 mm)* 24 in. (610 mm)*
42 in. (1067 mm) 42 in. (1067 mm)
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CANADA
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