Required direct vent terminal clearances (twin pipe / concentric penetration)
Clearance above grade, veranda, porch, deck or balcony
Clearance to window or door that may be opened
Clearance to permanently closed window
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
Clearance to unventilated soffit
Clearance to outside corner
Clearance to inside corner
Clearance to each side of center line extended above meter/
Clearance to service regulator vent outlet
Clearance to non-mechanical air supply inlet to building or the
combustion air inlet to any other application
Clearance to mechanical air supply inlet
Clearance above paved sidewalk or paved driveway located on
Clearance under veranda, porch deck or balcony
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;
b) A reference to the following footnote:
"Clearance in accordance with local installation codes and the requirements of the gas supplier."
C 1210 ES/ESC
36 in. within a height 15 feet above
meter/ regulator assembly
Installation instructions | 15
36 in. above if within 10 feet
6 720 644 887 (2013/02)