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When horizontally vented, minimum clearance for ter
mination from electric meters, gas meters, regulators
and relief equipment is 4 ft. (1.2m) for US installations.
Refer to the current CAN/CGA−B149.1 and .2 for
installations in Canada or with authorities having local
jurisdiction.
At vent termination, care must be taken to maintain
protective coatings over building materials (prolonged
exposure to exhaust condensate can destroy protec
tive coatings). It is recommended that the exhaust out
let not be located within 6 feet (1.8m) of a condensing
unit because the condensate can damage the painted
coating.
IMPORTANT
Combustion air intake inlet and exhaust outlet
should not be located within 6 ft. (1.8m) of dryer
vent or combustion air inlet or outlet of another ap
pliance. Piping should not exit less than 3 ft. (.91m)
from opening into another building.
FIGURE 27
Inches
(mm)
FRONT VIEW
WALL TERMINATION
(22G44) LB−49107CD for 2(51) Venting
(44J40) LB−65701A for 3(76) Venting
3 (76) OR
2 (51) 90
_
ELBOW
1/2 (13)
FOAM
INSULATION
Inches(mm)
3 (76) OR
2 (51) 90
_
ELBOW
3 x 2 (76 x 51) OR
2 x 1−1/2 (51 x 38)
REDUCER BUSHING LOCATION
FOR OFFSET TERMINATION
Optional Turndown
(Not Shown)
May Be Used on
Intake Only
FIGURE 28
METAL OR PLASTIC
STRAPPING
OR LARGE
WIRE TIES
10− Suspend piping using hangers at a minimum of every
5 feet (1.52m) for schedule 40 PVC and every 3 feet
(.91m) for ABS−DWV, PVC−DWV, SPR−21 PVC, and
SDR−26 PVC piping. A suitable hanger can be fabri
cated by using metal or plastic strapping or a large
wire tie.
11− In areas where piping penetrates joists or interior
walls, hole must be large enough to allow clearance on
all sides of pipe through center of hole using a hanger.
12− Isolate piping at the point where it exits the outside wall
or roof.
13− When furnace is installed in a residence where unit is
shut down for an extended period of time, such as a
vacation home, make provisions for draining conden
sate collection trap and lines.
14− Based on the recommendation of the manufacturer, a
multiple furnace installation may use a group of up to
four termination kits WTK assembled together horizon
tally, as shown in figure 30.
FIGURE 29
12
(305)
5
(127)
1/2 (13) Foam
Insulation in
Unconditioned Space
EXHAUST VENT
INTAKE VENT
OUTSIDE WALL
EXHAUST VENT
INTAKE
VENT
Front View
Side View
VENT TERMINATIONS
WALL TERMINATION KIT (30G28) WTK
Inches (mm)