Excel VBA union to increase efficiency

[Stuepef]

I have VBA code to hide rows based on cell value and it works perfectly fine, but I am wondering if inserting a union into the code would make it run more efficiency as there can be many rows that need to be hidden at one time. Thoughts?

Sub HideRws()   Dim Rng As Range, Cl As Range
   With Sheet3
      For Each Cl In .Range("A11:A60")
         Cl.EntireRow.Hidden = Cl.Value = ""
      Next Cl
      For Each Rng In .Range("A71:A120, A131:A180, A190:A239").Areas
         If Rng(1) = "" Then
            Rng.Offset(-6).Resize(58).EntireRow.Hidden = True
         Else
            For Each Cl In Rng
               Cl.EntireRow.Hidden = Cl.Value = ""
            Next Cl
         End If
      Next Rng
   End With
End Sub