If you're wondering how to fit radiator reflector foil, itís not really recommended. You canít simply pop a piece of foil back there and call it a day.
Some manufacturers provide a kit, so you can fit the reflector yourself by slotting it behind the radiator and attaching it with adhesive pads. Although, youíll likely get a more professional fitting if you hire an expert.
Thereís no need for a gas safe engineer, as the radiator isnít affected in any way. A painter / decorator
could do the work for you.