24
LP-520 REV. 5.1.17
Figure 10 – Vent Termination Detail
Clearance above grade, veranda, porch, deck, or balcony
Clearance to window or door that may be opened
4 feet below or to side of
opening; 1 foot above opening
Clearance to permanently closed window
Vertical clearance to ventilated soffit located above the
terminal within a horizontal distance of 2 feet from the center
line of the terminal
Clearance to unventilated soffit
Clearance to outside corner
Clearance to inside corner
Clearance to each side of center line extended above meter
/ regulator assembly
Clearance to service regulator vent outlet
Above a regulator within 3 feet
(91 cm) horizontally of the
vertical center line of the
regulator vent outlet to a
maximum vertical distance of
15 ft (4.5 m)
Clearance to non-mechanical air supply inlet to
building or the combustion air inlet to any other
appliance
4 feet below or to side of
opening; 1 foot above opening
Clearance to a mechanical air supply inlet
3 feet above if within 10 feet
horizontally
Clearance above paved sidewalk or driveway
located on public property
Clearance under veranda, porch, deck, or balcony
Table 10 – Vent Termination Clearances
*NOTE: For clearances not specified 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.