Bard T48S1
Bard W18AY
Unit depthUnit depthSupply AirReturn AirSupply AirReturn Air29.88"9.88"29.88"15.88"19.88"7.88"19.88"11.88"42.075"33.3"93"74.563"22.432"17.125"2.18"2.183"30"20.56"35.06"32.06"Supply AirReturn AirSupply AirReturn Air
MISMATCH

These units don’t appear to have much in common. If you’re replacing one with the other, you’ll need to make some modifications to wall, unit or something in between with a plate or adapter curb.

Match Bard T48S1 Bard W18AY Difference
Distance from the top to Supply2.18"2.183"+0.003"
Mismatch Bard T48S1 Bard W18AY Difference
Unit width42.075"33.3"-8.775"
Unit height93"74.563"-18.437"
Unit depth22.432"17.125"-5.307"
Unit weight560 lbs329 lbs-231 lbs
Supply Air29.88" x 9.88"19.88" x 7.88"-10" x -2"
Return Air29.88" x 15.88"19.88" x 11.88"-10" x -4"
Distance between Supply and Return30"20.56"-9.44"
Distance from Return to bottom35.06"32.06"-3"