Kozy World natural gas and liquid propane vent free gas wall heaters and stoves are a great way to heat a new addition, a previously unheated area of your home, or simply to reduce total home heating costs. No chimney or duct work is required and the vent free design keeps 99% of the heat in your home. When choosing a wall heater, choose from our infrared ceramic plaque or glowing ambient blue flame burner designs. The infrared models heat like the sun, providing immediate warmth to people and objects in the room. The ambient blue flame models provide convective heat for fast whole room heating. The free standing design of our vent free stoves makes them a great choice where wall space is too limited to install a wall heater or fireplace. You also get the charm of a real wood fire without all the mess of wood and ashes. No electricity is required for our wall heaters or stoves, making them an excellent source of heat during emergencies. All models include an ODS or Oxygen Depletion Sensor which automatically shuts off the gas supply in the rare event that the oxygen level in the room drops to an unsafe level as established by ANSI (American National Standards Institute). An optional floor mounting kit (wall heaters), fan, and gas appliance installation kit are also available for certain models.