Two sizes available.. 

The Premier 170 Portable Tent Heater with 17 0,000BTU. Heats up to a 40×80 tent and will run approximately 7-8 hours when set at 65 degrees.

Or the Premier 80 Portable Tent Heater with 80,000 BTU. Fuel tank will run approximately 10-12 hours when set at 65 degrees. 

These heaters deliver safe, quiet, and efficient heat to maintain a comfortable environment inside, no matter what the weather is outside.