A water heater that heats water before it is directly distributed (i.e. wthout storing in a tank) for end use as required. Tankless water heaters include demand water heaters and tankless coil water heaters.
A water heater that heats water before it is directly distributed for end use as required; a demand water heater.
A water heater that heats water before it is directly distributed for end use as required; a demand water heater.