Venting

Requirements for Terminating the Venting WARNING: Venting terminals must not be recessed into a wall or siding.

NOTE: Only PL vent pipe wall pass-throughs and fire stops should be used when venting through combustible materials.

NOTE: Always take into consideration the effect the prevailing wind direction or other wind currents will cause with flyash and /or smoke when placing the ter- mination.

In addition, the following must be observed: A. The clearance above grade must be a minimum of 18”.1

B. The clearance to a window or door that may be opened must be a minimum of 48” to the side, 48” below the window/door, and 12” above the window/ door.1

C. A 12” clearance to a permanently closed window is recommended to prevent condensation on the window. D. The vertical clearance to a ventilated soffit located above the terminal within a horizontal distance of 2 feet (60 cm) from the center-line of the terminal must be a minimum of 18”.

E. The clearance to an unventilated soffit must be a minimum of 12”.

F. The clearance to an outside corner is 11” from center of pipe.

G. The clearance to an inside corner is 12”.

H. A vent must not be installed within 3 feet (90 cm)

above a gas meter/regulator assembly when measured from the horizontal center-line of the regulator.1

I. The clearance to service regulator vent outlet must be a minimum of 6 feet.1

J. The clearance to a non-mechanical air supply inlet to the building or the combustion air inlet to any other appliance must be a minimum of 48”.1

K. The clearance to a mechanical air supply inlet must be a minimum of 10 feet.1

L. The clearance above a paved sidewalk or a paved driveway located on public property must be a minimum of 7 feet.1,2

M. The clearance under a veranda, porch, deck or balcony must be a minimum of 12 inches.1,3 (B Also applies)

NOTE: The clearance to vegetation and other exterior combustibles such as mulch is 36” as measured from the center of the outlet or cap. This 36” radius continues to grade or a minimum of 7 feet below the outlet.

1Certain Canadian and or Local codes or regulations may require different clearances.

2A vent shall not terminate directly above a side- walk or paved driveway which is located between two single  family dwellings and serves both dwellings.

3Only permitted if veranda, porch, deck, or balcony is fully open on a minimum of 2 sides beneath the floor.

NOTE: Where passage through a wall, or partition of combustible construction is desired, the installation shall conform to CAN/CSA-B365. (if in Canada)

= Vent terminal	= Air supply inlet	= Area where terminal is not permitted	Fig. 2
			9