What is the difference between a Schwank infrared tube heater and a Schwank luminous (high intensity) heaters?
Both types are energy efficient, but they employ different techniques to convert fuel into radiant heat. In a Schwank tube heater, the radiant heat is produced by a steel tube (length from 10-70 feet) that is heated to temperatures ranging from 350-1050 degree Fahrenheit; in a Schwank luminous heater, the radiant heat is produced by a ceramic surface (comprised of varying numbers of ceramic tiles) at 1750 degree Fahrenheit. Note that infrared heaters are also often called ‘radiant’ heaters.