Because there's no connection to the outside, they can be installed on inside walls or even out into a room. If the appliance begins emitting a dangerous level of carbon monoxide, the detector sounds a warning signal. In the case of oxygen depletion, the unit shuts down. Three-sided views are a strong point of peninsula designs. Vent-free units produce up to 40,000 Btu.
Catalytic systems are the latest in vent-free fireplace operation.
Unlike other vent-free units, which are open to the room, catalytic systems, such as the PureHeat line from Superior, are closed. A built-in catalytic converter removes the harmful pollutants that result from the combustion process. What's more, because the converter relies on air drawn from the room to operate, it cleans the air in the room as well. Privacy policy .