99
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 air
fl
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
fi
gure below. Any reduction in these clearances could result in a disruption of the air
fl
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 within 7’ of grade require a terminal guard when using the 551DVK.
•
•
•
•
•
•
KEY VENT TERMINAL LOCATIONS - MINIMUM DISTANCES
MIN. CLEARANCES
in
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 sof
fi
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 sof
fi
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 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.
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
fl
oor.
12
30
Note: Local codes and regulations may require different clearances.
Horizontal Termination Locations
