Bard WH421
Bard W30LY
MISMATCH

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 WH421 Bard W30LY Difference
No matches in measurement - - -
Mismatch Bard WH421 Bard W30LY Difference
No mismatches in measurement - - -