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 HVPA24HP | Bard W18LB | Difference |
|---|---|---|---|
| Unit depth | 17.125" | 17.125" | 0" |
| Supply Air | 28" x 8" | 19.88" x 7.88" | -8.12" x -0.12" |
| Distance from the top to Supply | 2" | 2.183" | +0.183" |
| Mismatch | Marvair HVPA24HP | Bard W18LB | Difference |
|---|---|---|---|
| Unit width | 47.875" | 33.3" | -14.575" |
| Unit height | 70.625" | 74.563" | +3.938" |
| Unit weight | 420 lbs | 325 lbs | -95 lbs |
| Return Air | 28" x 14" | 19.88" x 11.88" | -8.12" x -2.12" |
| Distance between Supply and Return | 17.875" | 20.56" | +2.685" |
| Distance from Return to bottom | 28.75" | 32.06" | +3.31" |