Dura Heat Tank Top Heater, Silver Csa certified safety tip function; csa certified support leg; match light Uses 20Lb. Lp gas cylinder; variable output (9k-13k-15k btu's) Heavy duty steel construction Proved radiant infrared heat No electricity required; wind screen and safety guard Outdoor/Construction Use -Heating Area: up to 700 sq ft Match light/Tip-over Safety Shut off Heavy duty steel construction BTU Output: 15,000 20lb Propane tank sold separately