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 WA423 | Bard WA121 | Difference |
|---|---|---|---|
| Distance from the top to Supply | 2.175" | 2.25" | +0.075" |
| Mismatch | Bard WA423 | Bard WA121 | Difference |
|---|---|---|---|
| Unit width | 42.075" | 30.125" | -11.95" |
| Unit height | 84.875" | 46" | -38.875" |
| Unit depth | 22.432" | 14.625" | -7.807" |
| Unit weight | 500 lbs | 155 lbs | -345 lbs |
| Supply Air | 29.88" x 9.88" | 17" x 5" | -12.88" x -4.88" |
| Return Air | 29.88" x 15.88" | 17" x 10" | -12.88" x -5.88" |
| Distance between Supply and Return | 30" | 5" | -25" |
| Distance from Return to bottom | 26.94" | 23.75" | -3.19" |