Dura Heat Tank TOP Heater, Silver Csa certified safety tip function; independent swivel heads; match light; for outdoor use only Uses 20 lb. Propane(lp) cylinder; variable output (18k-26k-30k btu's) Heavy duty steel construction Provides radiant infrared heat No electricity required; wind screen and safety guard Propane tank not included** Outdoor/Construction Use -Heating Area: up to 1,000 sq ft Match light/Independent swivel heads w/ safety tip over Wind resistant & rain Protected Provides radiant infrared heat 20lb Propane tank sold separately