Bard W18A1
Bard 24WA1
Unit depthUnit depthSupply AirReturn AirSupply AirReturn Air19.88"7.88"19.88"11.88"20"8"20"12"33.3"32.25"70.563"67.5"22.125"13.5"2.183"1.375"20.56"20.5"28.06"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 W18A1 Bard 24WA1 Difference
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 W18A1 Bard 24WA1 Difference
Unit width33.3"32.25"-1.05"
Unit height70.563"67.5"-3.063"
Unit depth22.125"13.5"-8.625"
Unit weight335 lbs318 lbs-17 lbs
Distance from the top to Supply2.183"1.375"-0.808"
Distance from Return to bottom28.06"25.625"-2.435"