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 AN04 | Bard WA251 | Difference |
|---|---|---|---|
| Distance from the top to Supply | 1.94" | 2" | +0.06" |
| Mismatch | VoltAire AN04 | Bard WA251 | Difference |
|---|---|---|---|
| Unit width | 14.13" | 32.875" | +18.745" |
| Unit height | 30" | 70.5" | +40.5" |
| Unit depth | 12.3" | 16.875" | +4.575" |
| Unit weight | 65.6 lbs | 300 lbs | +234.4 lbs |
| Supply Air | 11.54" x 11.8" | 19.875" x 7.875" | +8.335" x -3.925" |
| Return Air | 11.54" x 6.59" | 19.875" x 11.875" | +8.335" x +5.285" |
| Distance between Supply and Return | 7.65" | 20.75" | +13.1" |
| Distance from Return to bottom | 2.02" | 28" | +25.98" |