Hopper keeps the heat coming for up to 40 hours per load. Fuel Type Pellet, Full Load Run Time Hours 40, Dimensions W x D x H in. 21 1/2 x 24 1/2 x 28 1/2, Flue Collar Size in. 3, Igniter Yes, BTU Output 40,000, Fire Box/Hopper Capacity lbs. 45, Heating Capability sq. Fully automatic operation with auto ignition and user-friendly controls Large viewing area with air wash glass Digital control board with built-in diagnostics Blower with auto circulation Integrated damper control. Flue collar Nickel spring handle Approved for mobile home use with fresh air kit not included.