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 ECUA18 | VoltAire AN04 | Difference |
|---|---|---|---|
| No matches in measurement | - | - | - |
| Mismatch | Marvair ECUA18 | VoltAire AN04 | Difference |
|---|---|---|---|
| Unit width | 18" | 14.13" | -3.87" |
| Unit height | 58.125" | 30" | -28.125" |
| Unit depth | 18.063" | 12.3" | -5.763" |
| Unit weight | 247 lbs | 65.6 lbs | -181.4 lbs |
| Supply Air | 14.688" x 12.125" | 11.54" x 11.8" | -3.148" x -0.325" |
| Return Air | 13.25" x 5" | 11.54" x 6.59" | -1.71" x +1.59" |
| Distance from the top to Supply | 20.688" | 1.94" | -18.748" |
| Distance between Supply and Return | 19.062" | 7.65" | -11.412" |
| Distance from Return to bottom | 1.25" | 2.02" | +0.77" |