Fire Sense 60523 is a 40,000 BTU pyramid patio heater designed for outdoor use only. It operates on LP gas and requires a 20lb LP-Gas tank with dimensions of 18.1in / 46cm(Height) x 12.5in / 32cm (Width). The heater features a reflector for efficient heat distribution and a built-in water box for added humidity. It comes with a chain for easy hanging and wheels for convenient mobility. Safety features include a leak detection system, automatic shut-off, and overheat protection.