This heater is safe for indoor use in small recreational enclosures, having means for providing combustion air and ventilation, such as tents, cabins, fishing huts, and enclosed porches. It may be used for emergency indoor heating when connected to a disposable propane (G31) OR Butane/Propane mixture (G30+G31) cartridge and for indoor use in commercial enclosures, having means for providing combustion air and ventilation, such as construction trailers or temporary work enclosures. Indoor safe dual fuel heater CE certified for use with propane and butane blendedfuels One button ignition/on function Accidental tip-over safety shutoff 8round stand holds butane and propane fuel cylinders Automatic low oxygen shutoff system Heats up to 9 cubic meters Connects directly to disposable propane or butaneblended fuel cylinders Runs up to 6 hours with one cartridge Dimension: approx. 26 x 20,5 x 45,5 cm Certified for sale: DK, NO,SE, FI, PL, RU Note! Gas is sold separately.