How do infra-red heaters work?
Most infra-red heaters employ gas (propane or natural gas) combustion to heat a steel tube (tube heater) or ceramic surface (luminous heater), which subsequently emits infra-red heat. Its important to note how much infra-red heat is emitted (infra-red efficiency). You should also be aware that an infra-red burner produces both infra-red radiant heat (that is directed at people and objects) and convection heat that rises and is effectively lost.