MAX Tubular heaters usually consist of the following group of heaters; flanged immersion heaters screw-plug or bushing heaters over-the-side immersion heaters, circulation heaters, pipe insert heaters, forced air duct heaters and tubularifinned and non·finned) heating elements. They are suitable for heating requirements of water, oil and others liquid solutions as well as air and other gasses Tubular heaters are extremely efficient since all energy that is generated is transferred directly into the medium which is being heated.