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 W36HB | Bard W18AA | Difference |
|---|---|---|---|
| Unit height | 74.563" | 74.563" | 0" |
| Unit depth | 17.125" | 17.125" | 0" |
| Distance from the top to Supply | 2.123" | 2.183" | +0.06" |
| Mismatch | Bard W36HB | Bard W18AA | Difference |
|---|---|---|---|
| Unit width | 38.2" | 33.3" | -4.9" |
| Unit weight | 380 lbs | 325 lbs | -55 lbs |
| Supply Air | 27.88" x 7.88" | 19.88" x 7.88" | -8" x 0" |
| Return Air | 27.88" x 13.88" | 19.88" x 11.88" | -8" x -2" |
| Distance between Supply and Return | 17.93" | 20.56" | +2.63" |
| Distance from Return to bottom | 32.75" | 32.06" | -0.69" |