The Optim 1700mm straight radiator is a large, 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. It has a heat output of 931 watts (3177 BTUs), making it perfect for an average to large family bathroom. It conforms to EN442 standards having been tested 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.