return air support box with filter slot
Master Flow 16 in x 25 in Return Air Box with Filter Rail RAB16X25
return air support box with filter slot
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return air support box with filter slot 14 X 14 Steel Return Air Filter Grille for 1 Filter - Removable FaceDoor - HVAC DUCT COVER - Flat Stamped Face -White support* the box may be providing to the air handler itself I don't know what's inside the box to hold up the air handler, or Install the filter media box between the return air plenum and the air handler box 2 Slide the filter into the slot and place the filter
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