Besides pre-heaters for the coolant, also heaters are available for (direct) heating for (diesel) fuels, engine oils, hydraulic oils, transmission oils, other (industrial) liquids and batteries.
Also heaters available for more comfort and safety such as cabin heaters and battery chargers. (automotive, truck and bus applications). All with equal or similar positive effects as reducing wear, lower (fuel) consumption, lower environmental damage and longer lead time of the heated liquids.