... is too long to heat the water in whole tankFit for large powerUnderside heaterHeater put under bottom of water tankHeat quiet ... bath, footbath, washing hand, vegetable and dish. PTC water heater for drink warmer and boiler, vapor generater, detailed introduction can be seen ... the voltage twice or decrease of 1/2, for the same PTC heater.For more information, please visit our website http://www ...