Marvair AVPA12 (CABINET B)
Bard WA252
Unit depthUnit depthSupply AirReturn AirSupply AirReturn Air17"7.813"17"8.375"19.88"7.88"19.88"11.88"30.125"33.3"52"70.563"12.625"17.125"1.063"2.183"0.749"20.56"34"28.06"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 Marvair AVPA12 (CABINET B) Bard WA252 Difference
Supply Air17" x 7.813"19.88" x 7.88"+2.88" x +0.067"
Mismatch Marvair AVPA12 (CABINET B) Bard WA252 Difference
Unit width30.125"33.3"+3.175"
Unit height52"70.563"+18.563"
Unit depth12.625"17.125"+4.5"
Unit weight194 lbs300 lbs+106 lbs
Return Air17" x 8.375"19.88" x 11.88"+2.88" x +3.505"
Distance from the top to Supply1.063"2.183"+1.12"
Distance between Supply and Return0.749"20.56"+19.811"
Distance from Return to bottom34"28.06"-5.94"