The main problem people have with their hot water is that there is never enough. After a long day, it feels nice, and is sometimes very necessary, to grab a hot shower. But with a tank heater, if you have several family members needing to bathe, it’s inevitable that you’ll run out of hot water before everyone gets a turn. When the hot water empties from the tank, you need to wait for it to refill and reheat. It can take several hours to replenish hot water. A tankless water heater eliminates this issue altogether. It heats water on demand. Therefore, you can have hot water any time, all the time and for limitless amounts of time.