Mr. Heater Corporation F299812 10,000 BTU Vent Free Blue Flame Propane Icehouse Heater, MHVFIH10LPT 10,000 BTU Liquid Propane Icehouse heater to heat spaces up to 250 sqaure feet. Radiant heat burner Automatic low oxygen shut-off system (ODS). CSA Certified Operating this heater at altitudes over 4,500 FT above sea level could cause pilot/ODS to shutdown the heater. Legs and wall mounting hardware included