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 20WA4 | Bard 30WA2 | Difference |
|---|---|---|---|
| Supply Air | 19.875" x 7.875" | 28" x 8" | +8.125" x +0.125" |
| Distance from the top to Supply | 1.625" | 1.375" | -0.25" |
| Mismatch | Bard 20WA4 | Bard 30WA2 | Difference |
|---|---|---|---|
| Unit width | 32.375" | 38.25" | +5.875" |
| Unit height | 69.375" | 74" | +4.625" |
| Unit depth | 14.625" | 15.25" | +0.625" |
| Unit weight | 280 lbs | 380 lbs | +100 lbs |
| Return Air | 19.875" x 11.875" | 28" x 14" | +8.125" x +2.125" |
| Distance between Supply and Return | 20.5" | 18" | -2.5" |
| Distance from Return to bottom | 27.5" | 32.625" | +5.125" |