L.B. White Premier 80N Portable Forced Air Ductable Unit HeaterThese versatile heaters, used by many to heat tents for events, are also great for small or large work spaces, renovation jobs, and any application where an enclosed flame or low noise is important. Premier heaters can be used to provide heat or simple air circulation inside, or be ducted in from the outside Box heater, direct fired 80,000 BTUH, Natural Gas Max fuel consumption = 80. 0 cu. ft. hr. Heated Air Output = 450 CFM Amp draw = 5. 0 (starting)