Mr Heater's Big Buddy Heater F274865 can provide up to 18,000 BTU per hour with the capacity of heating up to 400 sq ft of space for up to 220 hours on low heat setting. The Dual Heating System ( DHS ) combines radiant heat comfort with convection heat air flow for maximum heating efficiency and may be used with smaller 1-lb propane cylinders or larger 20-lb propane tanks depending on heating needs. It's multi-position heat settings control the comfort level while the built-in low oxygen sensor / tip off switch and non-skid surface pads ensure safe indoor operation. The ergonomic easy carry handle and rear wall mounted holes make this heater versatile and easily portable. The F274865 is CSA Certified for indoor use and includes a 1 Year Limited Warranty. Tanks and Hoses are not included.