8
Horizontal Vent Terminal Locations
(see appliance manual for allowable vertical terminal locations)
• This direct vent appliance is designed to operate when
an undisturbed airflow hits the outside vent terminal
from any direction.
• The minimum clearances from this terminal that must
be maintained are shown in the figure below. Any reduc-
tion in these clearances could result in a disruption of
the airflow 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 it will
not be covered by snowdrifts.
• Sidewall vent terminations within 7’ of grade or where
easily accessible require a terminal guard such as the
Valor 658TG or 845TG.
Vent Termination
• The vent terminal must be located on a side wall or
through the roof. Where possible, venting through the
roof is preferable to sidewall venting to avoid products
of combustion from accumulating in outdoor spaces.
• Typically, outdoor spaces are not totally enclosed by sol-
id continuous walls. When sidewall venting is used, the
vent terminal will need to be located to avoid products
of combustion from accumulating within the outdoor
space or from entering the interior space through doors
and windows. See clearances listed below with respect to
openings to interior spaces.
• When a sidewall vent terminal terminates below an
overhead cover (either permanent or temporary cover)
at least 30% of the total perimeter wall area surrounding
the outdoor space must be openings.
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 so
ɝ
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 so
ɝ
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 (4.6
b
m) 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.
V
G
A
Min. 72”
Max. 72”
Alcove detail
(open on one
side) Normal
ceiling/so
ɝ
t
clearances
apply.
