Great heat output with a double panel radiator Double panel convector radiators, otherwise known as Type 21, benefit from a single convector that has been sandwiched between two single panels. The convector is only fitted to one of the panels and they are a bit thicker than a standard, single panel radiator but they do provide a much higher heat output. Due to their size their ideal for heating small to medium sized bedrooms. 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 to install fixing brackets Also included .