Vent Pipe and Termination Clearances

The final position of your appliance depends on the location of the termination in relation to the clearances that must be observed.

A= 12” (305mm) clearance above grade, veranda, porch, deck or balcony. ***

B= 9” (229mm) clearance in U.S. and 12” (305mm) clearance in Canada to window or door that may be closed.

C= 9” (229mm) clearance in U.S. and 12” (305mm) clearance in Canada to permanently closed window or door that maybe opened.

D= 18” (475mm) vertical clearance to ventilated and 12” (305mm) to unventilated soffit located above the terminal within a horizontal distance of 2 feet (610mm) from the centerline of the terminal.

E= 12” (305mm) clearance below eaves. F= 9” (229mm) clearance to outside corner.

G= 6” (15mm) clearance to inside corner.

H= not to be installed above a meter/regulator within 3 feet (914mm) horizontally from the centerline of the regulator. ***

I= 36” (914mm) clearance in U.S. and 72” (1829mm) in Canada to service regulator vent outlet. ***

J= 12” (305mm) clearance to non-mechanical air supply inlet to building or the combustion air inlet to any other appliance.***

K= 36” (914mm) clearance to a mechanical air supply inlet. L= 84” (2134mm) clearance above paved sidewalk or paved driveway located on public property. *

M= 12” (305mm) clearance under veranda, veranda, porch, deck or balcony. **

*vent shall not terminate directly above a sidewalk or paved driveway that is located between two single-family dwellings and serves

both dwellings.

**only permitted if veranda, porch, deck or balcony is fully open on a minimum of two sides beneath the floor.

***as specified in CGA-B149 installation codes (1991) for Canada or for U.S. installation follow the current National Gas Code, ANS Z223.1. Note: Local codes or regulations may require different clearances

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