Bard 24WH2
Bard 18WA1
Unit depthUnit depthSupply AirReturn AirSupply AirReturn Air20"8"20"12"20"8"20"12"32.25"32.25"69.375"67.5"13.5"13.5"1.375"1.375"20.5"20.5"27.5"25.625"Supply AirReturn AirSupply AirReturn Air
OPENING MATCH

Your openings match up but double check the cabinet surroundings. Over time equipment coils have gotten larger for better efficiency and cabinet dimensions have changed.

Match Bard 24WH2 Bard 18WA1 Difference
Unit width32.25"32.25"0"
Unit depth13.5"13.5"0"
Supply Air20" x 8"20" x 8"0"
Return Air20" x 12"20" x 12"0"
Distance from the top to Supply1.375"1.375"0"
Distance between Supply and Return20.5"20.5"0"
Mismatch Bard 24WH2 Bard 18WA1 Difference
Unit height69.375"67.5"-1.875"
Unit weight325 lbs310 lbs-15 lbs
Distance from Return to bottom27.5"25.625"-1.875"