Modern RV water heaters (WH) generally have two ways to heat water, operating in
either Electric or LP Gas mode. However, in entry level RVs the WH may be limited to
LP gas only. In some motorhomes there will be a third heating method called Motoraid,
which uses waste heat from the motorhome engine to heat the water as you drive. Finally,
some high end RVs may have an entirely different system in which the water heater is
part of a diesel & electric central heating system, typically either the Aquahot or
Hydrohot brand names. These systems are an entirely different animal and will not be
discussed here.
