26
Co-Axial Venting
Horizontal Vent Termination Location
• The vent terminal must be located on an outside
wall or through the roof.
• This direct vent appliance is designed to operate
when an undisturbed airȵ ow hits the outside vent
terminal from any direction.
• The minimum clearances from this terminal that
must be maintained when located on an outside
wall are shown in ȴ gure below. Any reduction in
these clearances could result in a disruption of the
KEY
VENT TERMINAL LOCATIONS - MINIMUM DISTANCES
Measured from the center of vent
MINIMUM
CLEARANCE
Inches Cm
A Clearance above grade, verandah, porch, deck or balcony 12 30
B Clearance to window or door that may be opened 12 30
C Clearance to permanently closed window (recommended to prevent condensation on window) 12 30
D
Vertical clearance to ventilated soɝ t located above the terminal within a horizontal distance of 2 feet (60 cm)
from the center-line of the terminal
18 46
E Clearance to unventilated soɝ t 12 30
F Clearance to outside corner 12 30
G Clearance to inside corner 12 30
H
Horizontal clearance to center-line of meter/regulator assembly located within 15 feet (4.6bm) below the
terminal
36 90
I
Clearance to service regulator vent outlet
36 90
J Clearance to non-mechanical air supply inlet to the building or the combustion air inlet to any other appliance 12 30
K Clearance to a mechanical air supply inlet 72 180
L
Clearance above paved sidewalk or a paved driveway located on public property
Note: A vent must not terminate directly above a sidewalk or paved driveway, which is located between two single-
family dwellings and serves both dwellings. THIS DOES NOT APPLY to direct vent, non-consdensing appliances in
the Province of Ontario.
84 210
M
Clearance under a verandah, porch, deck or balcony
Only permitted if veranda, porch, deck or balcony is fully open on a minimum of 2 sides beneath the ȵ oor
12 30
Note: Local codes and regulations may require di erent clearances.
Alcove detail
(open on one
side) Normal
ceiling/soɝ t
clearances
apply.
airȵ ow or a safety hazard. Local codes or regulations
may require greater clearances.
• The vent terminal must not be recessed into a wall
or siding.
• The vent terminal should be positioned where any
snowdrifts will not cover it.
• Sidewall vent terminations require a terminal guard
such as 658TG or 845TG when accessible—within 7’
of ground.
QUALIFIED
INSTALLER