Warms the air in the room.
Some systems use a fan to move the air.
The chart below provides specific information about radiant heaters, as well as passive and fan-forced convective heaters. Some heaters combine radiant and fan-forced convective systems. The use of the heater and its safety feature are also important considerations. How It Works a radiant heating system uses a hot surface to heat nearby objects and people a passive convective system heats air and air circulates around the room without a fan a fan-forced convective system also heats air, but uses a fan to push the heated air around the room. Advantages provides heat to objects without heating the air provides slow, constant, even heating of a room provides faster heating of an entire room.