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Page 16
4.6 Locations for Vent Pipe Terminator
* F or clearances not specified in ANSI Z224.1 / NFPA 54 or CAN/CSA-B 149.1, please use clearances in
accordance with local installation codes and the requirement of the gas supplier.
4.6.1 Direct Venting Clearances
A
Clearance above grade, veranda, porch, deck, or balcony
B
Clearance to window or door that may be opening
C
Clearance to permanently closed window
Vertical clearance to ventilated soffit located above the terminal
D
a horizontal distance of 2 feet from the center line of the terminal
E
F
G
Clearance to each side of center line extended above meter/
H
I
Clearance to service regulator vent outlet
Clearance to non-mechanical air supply inlet to building or the
J
combustion air inlet to any other appliance
K
Clearance to a mechanical air supply inlet
Clearance above paved sidewalk or paved driveway located on
L
M
Clearance under veranda, porch, deck, or balcony
Table 4.
Direct Vent Clearances
Description
within
Clearance to unventilated soffit
Clearance to outside corner
Clearance to inside corner
regulator assembly
public property
LAARS Heating Systems
US Direct Vent Instal-
Canadian Direct Vent
lations
12 in (30 cm)
12 in (30 cm)
*
*
*
*
*
3 ft (91 cm) within a
height 15 ft above the
*
*
12 in (30 cm)
3 ft (91 cm) above if
within 10 ft (3 m) hori-
zontally
*
*
Installations
12 in (30 cm)
36 in (91 cm)
*
*
*
*
*
meter/regulator as-
sembly
3 ft (91 cm)
36 in (91 cm)
6 ft (1.83 m)
7 ft (2.13 m)
12 in (30 cm)
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