Mr. Heater Corporation F299720 vent-free 20,000 BTU Blue Flame propane heater. Bought new never used. Blue Flame burner for even convection heat. Run time (Hrs at Max BTU) 21.59. Fuel consumption/Burn rate (Gal/Hr)- .926 lbs/hr automatic low oxygen shut-off system (ODS). Theromostat, legs and wall mounting hardware included