Heatstar Big buddy heater - BRAND NEW IN BOX

Heat output: 4,000, 9,000, or 18,000 BTU/hr. Heating area: Up to 450 sq. ft.. Fuel source: Propane. Safety features: Automatic low-oxygen shutoff (ODS) and a tip-over safety switch. Controls: Single-push button for ignition and a four-position control knob for heat settings. Fuel options: Can run on two 1 lb. propane cylinders or a 20 lb. tank using an optional hose