Vesta VH-150, Installation Manual

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23
Installing a Vent
A
G
FIXED
CLOSED
FIXED
CLOSED
INSIDE
CORNER DE
TAIL
OPERABL
E
OPERABL
E
B
F
C
B
B
L
D
E
B
J
H
M
K
B
B A
J
VENT TERMINAL AIR SUPPLY INLET AREA WHERE TERMINAL IS NOT PERMITTED
Canadian installations
1)
U.S. installations
2)
A Clearance above grade, veranda, porch, deck or balcony 12 in. (30 cm) 12 in. (30 cm)
B
Clearance to window or door that may be opened 36 in. (91 cm) 12 in. (30 cm)
C Clearance to permanently closed window * *
D
Vertical clearance to ventilated soffit located above the vent termination within
a horizontal distance of 2 feet (61cm) from the center line of the termination
* *
E Clearance to unventilated soffit * *
F
Clearance to outside corner * *
G Clearance to inside corner * *
H Clearance to each side of center line extended above meter/regulator assembly
36 in. (91 cm) within a height 15 feet
above meter/ regulator assembly
*
I Clearance to service regulator vent outlet 36 in. (91 cm) *
J
Clearance to non-mechanical air supply inlet to building or the combustion air
inlet to any other application
36 in. (91 cm) 12 in. (30 cm)
K Clearance to mechanical air supply inlet 72 in. (182 cm)
36 in. (91 cm) above if
within 10 feet horizontally
L Clearance above paved sidewalk or paved driveway located on public property 84 in. (236 cm)
3)
*
M Clearance under veranda, porch deck or balcony 12 in. (30 cm)
4)
*
1) In accordance with the current CSA B149.1 Natural Gas and Propane Installation Code.
2) In accordance with the current ANSI Z223.1 / NFPA 54 National Fuel Gas Code.
3) A vent shall not terminate directly above a sidewalk or paved driveway that is located between two single family dwellings and serves both dwellings.
4) 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 / NFPA 54 or CSAB149.1, one of the following shall be indicated:
a) A minimum clearance value determined by testing in accordance with section 2.20, or;
b) A reference to the following footnote:
“Clearance in accordance with local installation codes and the requirements of the gas supplier.”