The Dyna-Glo™ HeatAround 360 is a 18,000 BTU portable recreational heater that provides 360 degrees of warmth for spaces up to 450 square feet. Its compact, versatile, 360-degree design makes it the ideal choice for grab-and-go heat. The oxygen depletion sensor allows you to safely use this heater indoors when you need emergency heating. No electricity and no batteries are required, as it is fueled by one 1-pound propane tank (not included). The Dyna-Glo™ HeatAround 360 provides outstanding, portable heating for backyards and patios, tailgating, hunting, camping, fishing, emergency indoor heating, and many other uses.