DHE offers Electric Coil Heaters that can be classified based on their levels of energy input and heat output. Furthermore, they can be categorized according to the shape of the heating coil and whether the design is open or closed.

Open-coil heaters have the metal coil directly exposed. Because of this, heat has no covering to protect it. As a result, there is excellent efficiency in the heat energy transfer from the coil to the surrounding medium. These designs are considerably less expensive and require less upkeep than other options. The Coil, however, can be vulnerable to damage and might not be suitable for all heating applications, particularly when safety is an area of concern. They act as a de facto way to reduce the amount of watt density needed and stop heat-sensitive materials from degrading.