Mr Heater F299721 20000 BTU 3.89-Gal Vent Free Blue Flame Natural Gas Heater New
Model F299721. BTU Per Hour 20000. 20,000 BTU per hour. Tank Capacity 3.89 gal. Type Natural Gas Heater. Automatic low oxygen shut-off system (ODS). For use with Natural Gas. Fuel Type Natural Gas.