What are light-ends?

Heat transfer oil is a mixture consisting of multiple components. These components distinguish by their characteristics. All components with a low boiling temperature are called light ends. The low boiling temperature also comes with a low flashpoint. In combination with oxygen, these components can most likely form an ignitable mixture and therefore, they pose the highest risk for explosion and fire.

The behaviour of light ends is like benzine and poses a safety risk in thermal oil systems.