This propane forced air heater puts out 100,000 to 125,000 BTU of adjustable heat, enough to warm spaces up to about 3,100 square feet, and the head tilts between 30 and 45 degrees so heat goes exactly where it's needed. Dual safety systems, overheat protection and flameout protection, help guard against gas leaks, and the carbon steel body is impact-resistant, weatherproof, and rust-resistant for garages and open job sites. A built-in pressure regulator supports altitudes up to 4,921 feet for use well above sea level. Running on a standard 20-pound propane tank, it delivers 3.5 to 4.5 hours of steady heat per fill, and electronic ignition lights easily, even in wet weather, without matches. At just 19.73 pounds with a large ergonomic handle, it's easy to carry between the garage, a job site, or wherever cold-weather work needs fast, portable heat.