Hi
try the following macro:
Sub delete_rows()
Dim lastrow As Long
Dim row_index As Long
Application.ScreenUpdating = False
lastrow = ActiveSheet.Cells(Rows.Count, "Z").End(xlUp).Row
For row_index = lastrow - 1 To 1 Step -1
If Cells(row_index, "Z").Value= 0 then
Rows(row_index).delete
End If
Next
Application.ScreenUpdating = True
End Sub