Mr. Heater Corporation F299710, 10,000 BTU Vent Free Blue Flame Propane Heater, MHVFB10LP 10,000 BTU Liquid Propane heater to heat spaces up to 250 sqaure feet. Blue flame burner for even convection heat. 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