Dyna-Glo wall heaters are the ideal choice for safe, indoor supplemental heating. These heaters are great for use in your garage. Since these heaters do not require electricity to operate, they make an excellent choice for everyday heating, and emergency situations when the power goes out. Blue Flame Garage Heaters burn with 99.9% efficiency, and operates on Liquid Propane or Natural Gas. Not for sale in California or Canada. Check your local regulations on installation restrictions and requirements. INNOVATIVE - Can be operated with Propane OR Natural Gas. DEPENDABLE - Ideal for daily supplemental or emergency use, such as power outages. ECONOMICAL - Cut heating bills by warming only occupied areas. Comfort - Heater automatically adjusts to your desired temperature; just like your home thermostat. SAFE - Built-in oxygen depletion sensor (ODS) immediately shuts down the heater if carbon monoxide or lack of oxygen is detected & Wrong Fuel Shut-Off. CONVENIENT - One continuous press of the battery assisted igniter makes ignition quick & effortless. VERSATILE - Includes all necessary hardware & bracket for wall mounting. UPGRADEABLE - Separately sold optional Wall Heater Fan (WHF100) distributes heat in a quiet, yet powerful way. Color: Black.