Hello,
I see Screwfix are selling "Kudox radiators" and "Kudox premium radiators"; the latter claim to be more efficient so give a higher heat output for the same size radiator. I'm a bit skeptical about this. Surely a 600x800 white enamel surface is the same as any other
600x800 white enamel surface. What have they done to increase efficiency or is this just marketing hyperbole?
TIA