Vent Terminal Clearances - Heatilator NDV30-IFT Installation Manual

C. Vent Terminal Clearances
C
V
B
J
B
V
D
V
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
C clearance below ventilated soffit
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
F
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.
J
**(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
K
Location of the vent termination must not interfere with access to the electrical service.
clearance above electrical service
L
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
Heatilator • NDV30-IFT, NDV33-IFT, NDV36-IFT, NDV36-IFT-NVR, NDV42-IFT Installation Manual • 2620-980 Rev. C • 8/20
18
F
B
V
G
M
V
A
= AREA WHERE TERMINAL IS NOT PERMITTED
X
= AIR SUPPLY INLET
V
= VENT TERMINAL
H or i
V
X
H
V V
H
V
A
V
L
K
Electrical
V
Service
C
V
U.S.A. CANADA
12 in. (305 mm) 12 in. (305 mm)
9 in. (229 mm) 12 in. (305 mm)
12 in. (305 mm) 12 in. (305 mm)
18 in. (457 mm) 18 in. (457 mm)
30 in. (762 mm) 30 in. (762 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)
9 in. (229 mm) 12 in. (305 mm)
3 ft (914 mm)*** 6 ft (1.8 m)
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)
12 in. (305 mm) 12 in. (305 mm)*
30 in. (762 mm) 30 in. (762 mm)
K
V