My UH8-RF is installed in a metal cabinet, will the RF work? November 20, 2018 08:18 Updated Follow When the UH8-RF is installed in a metal cabinet, you should use the external aerial available here. The aerial should be positioned outside of the cabinet to ensure the UH8-RF can function correctly. Related articles How do I pair the neoAir to the UH8-RF What can cause RF signal issues? What causes my UH8-RF/RF Switch to come on unexpectedly ? How do I pair my Slimline-RF to the UH8-RF Where do I connect the heating valve on the RF switch?