Put simply, yes. Tankless water heaters provide endless hot water. Since there is no storage tank of water that a tankless water heater uses, as long as water flows through your pipes, it will be heated and sent where you want it to go, for as long as you want it to go there. In traditional heating systems, there is a set amount of water that is heated and stored, so when that runs out, your hot water has run out. Since the tankless heater has no tank, you can never run out of hot water.
Tankless water heaters can be found at www.supplyhouse.com
