Home Hamilton Products Return Air Box - 21 inch Wide, Model RAB21 UBD6_D0RRP77

Hamilton Home Products Return Air Box - 21 Wide Applications When installing the WMA series in an upflow application, the RAB 17/21 converts bottom-return air applications into a side-return air application. Use with the model RA 16 return air drop assembly for a complete side cold air return. Must be installed by a licensed contractor.When installing the 21 in. wide WMP series air handler in an upflow application
the RAB 21 converts the bottom return air application into a side return air application
Use with the model RA16 return air drop assembly for a complete side cold air return; for upflow applications only