Mr. Heater 30,000 BTU Vent-Free Liquid Propane Blue Flame Heater at Tractor Supply Co.
Dyna-Glo 10,000 BTU Propane (LP) Blue Flame Vent Free Wall Mount Ice House Space Heater - Walmart.com
Amazon.com: SIGNITEPRO DEGREES OF ACCURACY Propane Indoor Room Heater Blue Flame Vent-free Space Heater 2-in-1 Wall or Portable use - 20,000 BTU : Home & Kitchen
Dyna-Glo 30000-BTU Wall-Mount Indoor Natural Gas or Liquid Propane Vent-Free Convection Heater in the Gas Space Heaters department at Lowes.com
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