Slim yet powerful single panel radiators Single panel convector radiators, otherwise known as Type 11 radiators, are brilliant for heating smaller rooms. They aren't to be confused with a normal single panel radiator without the convector as they provide much more heat output in comparison. They are thicker than a normal single panel radiator but that is totally worth the increase in heat output. They're ideal for hallways as just one convector and one panel ensures a slim projection. Includes pre-fitted side panels and a top grill You'll easily be able to conceal the internals of the radiator with the factory fitted top grills and side panels. They provide an elegant finish to the radiator but without hindering any of the heat output that you receive from it. Easy .