30,000 BTU Vent Free Radiant Propane Heater with Thermostat and Blower
Amazon.com: Martin Direct Vent Propane Wall Furnace Heater for Indoor Homes or Offices with Built-in Thermostat and Glass Panel, 20,000 BTU : Tools & Home Improvement
Eskabe DVEL 20 Non-Electric Propane Direct Vent Stove
Williams 50,000 BTU Fireplace Front Liquid Propane Gas Room Heater 5002521A - The Home Depot