Avenger 20000-BTU Wall or Floor-Mount Indoor Natural Gas or Liquid Propane Vent-Free Infrared Heater at Lowes.com
Martin Propane Direct Vent Thermostatic Heater 20,000 Btu MDV20P - Fre - Ben's Discount Supply
Mr. Heater 20000 BTU BTU Propane Wall Mounted Space Heater with Adjustable Thermostat | Wayfair
Bluegrass Living Propane Gas Vent Free Blue Flame Gas Space Heater With Blower and Base Feet - 20,000 BTU, T-Stat Control - Model# B20TPB-BB - Factory Buys Direct