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AP18733 REV. 3.2.17
29
Figure 6 - Vent Termination Detail
Description US Canadian
A Clearance above grade, veranda, porch, deck, or balcony 1 foot (30 cm) 1 foot (30 cm)
B Clearance to window or door that may be opened
Direct Vent 1 foot (30 cm)
3 feet (91 cm)
Power Vent
1 foot (30 cm) above, or 4 feet (1.22
m) below or to side of opening
C Clearance to permanently closed window * *
D
Vertical clearance to ventilated soft located above the terminal within
a horizontal distance of 2 feet from the center line of the terminal
* *
E Clearance to unventilated soft * *
F Clearance to outside corner * *
G Clearance to inside corner * *
H
Clearance to each side of center line extended above meter/regulator
assembly
*
3 feet (91 cm) with a height
15 feet (4.57 m) above meter
/ regulator assembly
I Clearance to service regulator vent outlet * 3 feet (91 cm)
J
Clearance to non-mechanical air supply inlet to building
or the combustion air inlet to any other appliance
Direct Vent 12 in (30 cm)
3 feet (91 cm)
Power Vent
1 foot (30 cm) above, or 4 feet (1.22
m) below or to side of opening
K Clearance to a mechanical air supply inlet
3 ft (91 cm) above if within 10 ft (3
m) horizontally
6 feet (1.83 m)
L
Clearance above paved sidewalk or paved driveway located on public
property
* 1 foot (30 cm)
M Clearance under veranda, porch, deck, or balcony * 12 in (30 cm)
‡
Table 10 – Vent Termination Clearances - *NOTE: For clearances not specied in ANSI Z223.1/NFPA 54 or CAN/CSA-B 149.1, please use
clearances in accordance with local installation codes and the requirements of the gas supplier.
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