Operating instructions
14
Venting
KEY VENT TERMINAL LOCATIONS - MINIMUM DISTANCES 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 soffi 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 soffi t1230
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
Vent
Termination
• 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 airfl 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 the fi gure below. Any reduction in these clearances could result in a disruption of the
airfl 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 it will not be covered by snowdrifts.
• 551DVK sidewall vent termination requires the terminal guard 835TG when accessible—within 7 ft of
ground.
V
G
A
Min. 72”
Max. 72”
Alcove detail
(open on one
side) Normal
ceiling/soffi t
clearances
apply.