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 | VoltAire AT04 | Bard 20WA4 | Difference |
|---|---|---|---|
| Distance from the top to Supply | 1.59" | 1.625" | +0.035" |
| Mismatch | VoltAire AT04 | Bard 20WA4 | Difference |
|---|---|---|---|
| Unit width | 17.4" | 32.375" | +14.975" |
| Unit height | 29.5" | 69.375" | +39.875" |
| Unit depth | 12.9" | 14.625" | +1.725" |
| Unit weight | 74.7 lbs | 280 lbs | +205.3 lbs |
| Supply Air | 14.38" x 9.5" | 19.875" x 7.875" | +5.495" x -1.625" |
| Return Air | 14.38" x 11" | 19.875" x 11.875" | +5.495" x +0.875" |
| Distance between Supply and Return | 5.85" | 20.5" | +14.65" |
| Distance from Return to bottom | 1.56" | 27.5" | +25.94" |