DynaGlo 20000 BTU Liquid Propane Blue Flame Vent Free Thermostatic Wall Heater
 
Blue Flame Technology works by convecting heat to warm the air the same way as a central heating system
16, 000-20, 000 BTU's/hr variable heat output for up to 700 sq. ft.
Variable control knob offers the most customizable heat settings LOW - 16, 000 BTU MED - 18, 000 BTU HI - 20, 000 BTU
No electricity required allows for reliable back-up heating incase of an emergency situation