Is it better to load firewood or water heating in the tram?

The tram is equipped with firewood for heating. Trams can be equipped with wood heating, and diesel heating is the heating method used by trucks and RVs. As a heat source, diesel oil can be burned to obtain heat and achieve the purpose of heating. However, the original heating device of electric vehicle uses heating pipe to replace the warm air water tank of gasoline vehicle, and the effect is the same, achieving the heating function. However, this heating method will consume the battery power and have a certain impact on the cruising range. If it can be heated by diesel, it can not only achieve heating, but also improve the cruising range.