British Thermal Units Calculator
British Thermal Units Calculator . Unit of measurement for power, used by the international system. Btu (british thermal unit) calculator. Watts to BTU Conversion Calculator British Thermal Unit Watt from www.scribd.com Home of cast iron radiators, fireplaces & stoves. The heat output or 'btu' (british thermal unit) calculator is a great way to work out how much radiator power you need. There are several factors which can affect this, such as room dimensions, heating levels and types of window, which are all covered in our radiator btu calculator.