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INDOOR
DRAFT HOOD
INDOOR HEATERS
The design is also certified for indoor installation when equipped with the approved draft hood. Locate heater
as close as practical to a chimney or gas vent. Heater must always be vented to the outside. See Vent Piping Section
for venting details. Minimum allowable space is shown on the nameplate.
12
COMBUSTION AIR (INDOOR UNITS ONLY)
AIR FOR COMBUSTION AND VENTILATION (Indoor Units Only)
The heater must have both combustion and ventilation air. Minimum requirements for net free air supply
openings, one 12 inches from ceiling for ventilation and one 12 inches from the floor for combustion air as outlined
in Z 223.1 - 1988 and any local codes that may have jurisdiction.
CAUTION: Combustion air must not be contaminated by corrosive chemical fumes which can damage the heater
and void the warranty.
a. All Air From Inside the Building:
Each opening shall have a minimum of 151 net free square inches.
b. All Air From Outdoors:
When air is supplied directly from outside of building, each opening shall have a minimum of 38 net free square
inches.
VENTING CONNECTIONS
VENT TERMINAL (Outdoor) STACKLESS TOP
STEP 1 : Remove the front (4) screws which fasten
jacket top to heater.
STEP 2 : Line up top vent opening over heater vent
opening.
STEP 3 : Lower outdoor top onto unit lining up slots
in outdoor top with screw holes in jacket
top.
STEP 4 : Reinstall (6) screws to secure jacket top
and outdoor top to unit.
Fig. # 9305
Top Vent Opening
Fig. # 9306