Constructed of heavy duty black steel, the NordicStove Basic is a radiant heater available in model sizes: Basic 68 (6800 BTU), Basic 130 (13,000 BTU), Basic 250 (25,000 BTU), and Basic 400 (40,000 BTU). This unique heating versatility is ideal for a wide range of heating requirements. NordicStove heaters require no electricity. Ideal for heating your boat, cabin, or home. Heavy stovetop is perfect for cooking.