Industrial heaters are used in a variety of processes where the temperature of an object or process needs to be increased. ... Industrial electric heaters work by converting electrical energy into heat. The heat is then transferred to the process through various forms of heat transfer. 

There are several differences between but the most distinct is temperature range. As a normal rule, ovens operate at 250 o F to 900 o F while furnaces can reach temperatures of 2000 o F or higher. Industrial furnaces come in different configurations and designs.