Cold weather doesn t mean you have to be cold too! Heat things up and stay toasty warm from your head to your toes with the Mr. Heater Big Buddy Portable Propane Heater. This indoor safe heater features high medium and low settings and gives off 4 000 9 000 or 18 000 BTU per hour. The single control start knob allows you to quickly and easily get things warmed up. This heater is ideal for cabins patios garages barns hunting blinds tents sporting events and more. It has the capability to heat an enclosed space of up to 450 square feet. The integrated fan increases the heating capacity of the unit. You ll be warm and safe because this heater features an automatic oxygen depletion sensor and an accidental tip over shutoff. This heater can be used with 2 1 pound propane tanks or connected to a propane tank of up to 40 pounds with the use of an additional hose and filter. Hose and filter are not included.