Mr. Heater 18,000 BTU Vent Free Propane Indoor Outdoor Space Heater (2-Pack) 2 x MH-F299820 - The Home Depot
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
Vent-free Liquid propane Gas Space Heaters at Lowes.com
Bluegrass Living 30000-BTU Wall or Floor-Mount Indoor Liquid Propane Vent-Free Convection Heater at Lowes.com