Bard W42G1
Bard WA4S3
Unit depthUnit depthSupply AirReturn AirSupply AirReturn Air29.88"9.88"29.88"15.88"29.88"9.88"29.88"15.88"42"42.075"87.5"94.875"27.25"22.432"2.99"2.175"30"30"28.75"36.94"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 W42G1 Bard WA4S3 Difference
Unit width42"42.075"+0.075"
Supply Air29.88" x 9.88"29.88" x 9.88"0"
Return Air29.88" x 15.88"29.88" x 15.88"0"
Distance between Supply and Return30"30"0"
Mismatch Bard W42G1 Bard WA4S3 Difference
Unit height87.5"94.875"+7.375"
Unit depth27.25"22.432"-4.818"
Unit weight700 lbs562 lbs-138 lbs
Distance from the top to Supply2.99"2.175"-0.815"
Distance from Return to bottom28.75"36.94"+8.19"