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Bosch C 950 Installation Manual page 15

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Required direct vent terminal clearances (twin pipe / concentric penetration) for PVC, CPVC, ABS, and PP.
Fig. 10
A
Clearance above grade, veranda, porch, deck or balcony
B
Clearance to window or door that may be opened
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
I
Clearance to service regulator vent outlet
J
Clearance to non-mechanical air supply inlet to building or the
combustion air inlet to any other application
K
Clearance to mechanical air supply inlet
L
Clearance above paved sidewalk or paved driveway located on
public property
M
Clearance under veranda, porch deck or balcony
Table 24
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 CSA-
B149.1, one of the following shall be indicated:
a) A minimum clearance value determined by testing in
accordance with section 2.20, or;
Greentherm
1)
Canadian installations
12 in.
36 in.
*
*
*
*
*
36 in. within a height 15 feet above
meter/ regulator assembly
36 in.
36 in.
72 in.
3)
84 in.
4)
12 in.
b) A reference to the following footnote:
"Clearance in accordance with local installation codes and the
requirements of the gas supplier."
Installation instructions | 15
2)
U.S. installations
12 in.
12 in.
*
*
*
*
*
*
*
12 in.
36 in. above if within 10 feet
horizontally
*
*
6 720 805 440 (2014/11)

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