18,000 BTU, Propane Cabinet Heater, Heats Approximate 450 SQFT, No Electricity Required, 3 Heat Settings, Operates Up To 60 Hours On A Standard 20 LB LP Cylinder, Sold Separately, Built In Oxygen Depletion Shut Off, Built In Hose & Regulator, Protective Grill Guard, 4 Rolling Casters With Locking Mechanism, Not Approved For Residential Living Areas Or Recreational Vehicle Use, Perfect As A Temporary Heat Source For Tough Jobs.