50-80,000 BTU, Convection Style LP Heater, Projects Heat 360 Degree, Knock-Down Chamber Provides Easy Portability, Matchless Piezo Ignition, No Electricity Required, Heats Approximately 2,000 SQFT, Operates Approximately 17 Hours On A Single 40 LB Cylinder, Sold Separately, Perfect For Drywalling, Painting & Concrete Curing, Ideal For Professional & Do It Yourself Construction Projects.