"Full Description:\nThe Mr. Heater Big Buddy Pro with Fan Portable Heater is one of the most popular portable propane heaters, delivering reliable, comfortable, and safe heat to your enclosed spaces. With a powerful heating output ranging from 4,000 to 18,000 BTU per hour, this patented radiant heater is the perfect solution for warming areas up to 450 sq. ft., including cabins, workshops, or large ice fishing shelters. It connects directly to two 1 lb. propane cylinders (sold separately), and the two swivel regulators offer versatility, allowing you to easily adapt to a larger 20 lb. remote cylinder (with optional hose and filter—all sold separately). The simple push-and-rotate single control knob and built-in Piezo ignition ensure effortless startup, while integrated safety features like the Oxygen Depletion Sensor (ODS) and accidental tip-over safety shut-off provide peace of mind for years of indoor safe heat. \n \nPlease Note: The fan runs on four D batteries or an AC power cord, which are sold separately.\n*Attention CA Residents: The use of vented heaters is prohibited indoors. Please abide any local and state restrictions in accordance with proper use.\n\nFeatures:\n\u003cul>\n\u003cli>Durable construction is suitable for a wide variety of uses, including job sites, ice shanties, and garages\u003c/li>\n\u003cli>Indoor Safe: Features Automatic Low Oxygen Shut-off System (ODS) and Accidental Tip-Over Safety Shut-off\u003c/li>\n\u003cli>Two swivel regulators allow connection to two 1 lb. cylinders or an optional remote gas supply\u003c/li>\n\u003cli>3 Heat Settings: Choose between 4,000, 9,000, or 18,000 BTU per hour for customized comfort\u003c/li>\n\u003cli>Single control start knob and built-in Piezo ignition for easy lighting\u003c/li>\n\u003cli>Heats enclosed spaces up to 450 sq. ft.\u003c/li>\n\u003cli>Fan enhances heat distribution\u003c/li>\n\u003c/ul>\n\nSpecifications:\n\u003cul>\n\u003cli>Tank Capacity (Min): 2 x 1# Propane Cylinder (Connects to a 20 lb. cylinder with optional hose)\u003c/li>\n\u003cli>Warranty: 1-year manufacturer's limited warranty\u003c/li>\n\u003cli>BTU per Hour: 4,000 / 9,000 / 18,000\u003c/li>\n\u003cli>Oxygen Depletion Sensor (ODS): Yes\u003c/li>\n\u003cli>Heating Area: Up to 450 sq. ft.\u003c/li>\n\u003cli>Maximum Elevation: 7,000 ft.\u003c/li>\n\u003cli>Safety Tip-over Switch: Yes\u003c/li>\n\u003cli>Dimensions: 19" L x 12" W\u003c/li>\n\u003cli>Heat Type: Radiant\u003c/li>\n\u003cli>Fuel Type: Propane\u003c/li>\n\u003cli>Weight: 17.1 lbs.\u003c/li>\n\u003cli>Ignition: Piezo\u003c/li>\n\u003cli>Thermostat: No\u003c/li>\n\u003c/ul>\n"