The Solarfusion vent-free gas space heater combines both radiant and convection heat to heat a room. The heater forces air movement throughout the room using a silent Venturi effect. It doesn't need a chimney, so no heat is lost in venting, resulting in 99.9 percent energy-efficient heat circulating in the room. It is available in mid-range and large models, featuring a maximum output range of 20,000 to 30,000 Btu. Solarfusion does not rely on electricity to operate, so homeowners can still heat their houses even after a winter storm knocks out the power supply. The heater can operate in a home heated either by natural gas or liquid propane gas.

DESA Heating LLC, 2701 Industrial Dr., Bowling Green, KY 42101; 866-672-6040;

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