If the power goes out, be safe and comfortable with this Non-Electric Patented Pellet Stove. It is the only EPA and UL-Approved Non-Electric Pellet Stove. It heats up to 2,000 square feet for up to 31 hours without refueling.Overall efficiency of 75% Heats up to 2,000 square feet Heats up to 31 hours without refueling No electricity required Silent operation - no blower or operation noise EPA and UL-Approved 60 Lb. hopper capacity 40,000 BTU outputAssembly Required: Yes Depth: 15 Height: 52 Material: Steel Mount Type: Freestanding Width: 24