There are many differences with a Tankless Hot Water Heater vs. a standard unit and below we are going to highlight some of the benefits. Tankless Water Heaters work differently than standard water heaters because they heat the water on demand as it flows through the unit, versus having a storage tank that keeps a set amount of water hot and ready for dispension. A standard heater may provide you anywhere from 40-60 Gallons of hot water at one time but a Tankless Water Heater can provide you with a steady stream of hot water that can last for virtually any amount of time. If you are bathing in one bathroom while someone is showering in the other and you’re running the washing machine and dishwasher at the same time, all of those appliances need hot water to run. With a standard water heater some or at least one of those appliances will usually run out of hot water leaving only a cold water supply. With a Tankless Water Heater all of those appliances could run simultaneously without ever suffering the loss of hot water..