Bard W18AA
Bard 24WH2
Unit depthUnit depthSupply AirReturn AirSupply AirReturn Air19.88"7.88"19.88"11.88"20"8"20"12"33.3"32.25"74.563"69.375"17.125"13.5"2.183"1.375"20.56"20.5"32.06"27.5"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 W18AA Bard 24WH2 Difference
Unit weight325 lbs325 lbs0 lbs
Supply Air19.88" x 7.88"20" x 8"+0.12" x +0.12"
Return Air19.88" x 11.88"20" x 12"+0.12" x +0.12"
Distance between Supply and Return20.56"20.5"-0.06"
Mismatch Bard W18AA Bard 24WH2 Difference
Unit width33.3"32.25"-1.05"
Unit height74.563"69.375"-5.188"
Unit depth17.125"13.5"-3.625"
Distance from the top to Supply2.183"1.375"-0.808"
Distance from Return to bottom32.06"27.5"-4.56"