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Indoor unit installation
This appliance is approved for zero (0) inches clearance to combustible material on any part of the air handler exterior casing and
the inlet or outlet ducts providing NO electric heater is being used. There is a one (1) inch clearance on the supply plenum and
supply air duct when an electric heater is installed in the appliance. Refer to Table below for clearance to combustibles information.
Top (inches)
Back (inches)
0
0
* when electric heat kit accessory is installed
Return air requirements
Return Air Requirements
In order for the air handler to work properly, a closet or alcove must have a certain total free area opening for the return air.
For A/C and HP Air Handlers 1/3 HP Blower Motor
Minimum 200 in² free area opening
Use Return Grille that can supply sufficient air to ensure proper performance.
For A/C and HP Air Handlers 1/2 HP Blower Motors
Minimum 250 in² free area opening
Use Return Grille that can supply sufficient air to ensure proper performance.
For A/C and HP Air Handlers with Electric Heat use 3/4 HP Blower Motor
Minimum 390 in² free area opening
Use Return Grille that can supply sufficient air to ensure proper performance.
The return air opening can be located in the floor, on a closet front door or in a side wall above the air handler casing. If opening
for the return air is located in the floor, side walls, or closet door anywhere below the appliance casing, a 6 inch minimum
clearance between the appliance and the wall or door must be provided on the side where the return is located to provide for
proper air flow. The 6 inch minimum clearance is not required if there is a return grille installed above the appliance casing,
providing the grille has a sufficient return air opening.
Sides (inches)
Alcove (inches)
0
30
0"
0"
8
Front of unit
Duct (inches)
Closet (inches)
6
1 *
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