Return Air Grille Installation Options
The room return air grille may be installed toward the front or either side of the unit.
Improper return air arrangements will cause performance problems.
There are three indoor return air grille installation options.
Choose the option that best
suits your installation requirements. Follow the Installation Instructions provided with the
return air grille accessory for installation details.
NOTE: Use only one filter in the installation.
The filter may be installed on the unit or in
the access panel/door.
Outside wall
Access panel with return air grille
Filter
Option 1
Return air grille
Filter
Option 2
Unit-mounted filter with a field-supplied return
air grille and access door/pane
l
Filter
Option 3
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