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 W12A1 | Bard WL421 | Difference |
|---|---|---|---|
| Distance from the top to Supply | 2.25" | 2.175" | -0.075" |
| Mismatch | Bard W12A1 | Bard WL421 | Difference |
|---|---|---|---|
| Unit width | 30.125" | 42.075" | +11.95" |
| Unit height | 46" | 84.875" | +38.875" |
| Unit depth | 14.625" | 22.432" | +7.807" |
| Unit weight | 155 lbs | 500 lbs | +345 lbs |
| Supply Air | 17" x 5" | 29.88" x 9.88" | +12.88" x +4.88" |
| Return Air | 17" x 10" | 29.88" x 15.88" | +12.88" x +5.88" |
| Distance between Supply and Return | 5" | 30" | +25" |
| Distance from Return to bottom | 23.75" | 26.94" | +3.19" |