Bard 45WH1
Bard 48WA3
Unit depthUnit depthSupply AirReturn AirSupply AirReturn Air30"10"30"16"30"10"30"16"42"38.25"84"84"22"18"1.375"1.375"30"30"26.625"26.625"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 45WH1 Bard 48WA3 Difference
Unit height84"84"0"
Supply Air30" x 10"30" x 10"0"
Return Air30" x 16"30" x 16"0"
Distance from the top to Supply1.375"1.375"0"
Distance between Supply and Return30"30"0"
Distance from Return to bottom26.625"26.625"0"
Mismatch Bard 45WH1 Bard 48WA3 Difference
Unit width42"38.25"-3.75"
Unit depth22"18"-4"
Unit weight500 lbs496 lbs-4 lbs