The Optim 600mm straight bathroom radiator is a small, superior quality steel radiator with a simple, clean design. Finished in white, it offers something a little bit different to a chrome radiator, adding uniqueness and interest to your bathroom. At 450mm wide, it has a heat output of 274 watts (936 BTUs). It's low height makes it perfect to sit underneath a window in a smaller bathroom. It has been tested to EN442 at a temperature delta of 50 degrees. This type of radiator must be used on closed heating system which contain a rust inhibitor. Radiator valves should be purchased separately if required.