1. High energy efficiency
A tank less water heater will operate only when hot water is required so they consume 30-50% less energy than traditional water heater.
By reducing the energy consumption tank less system can save your family 100$ per year.
In tank less water is provided on demand, so it heats only the required amount of water, where as traditional water heater heats the full tank of water which requires more energy.
2. Never run of water
Traditional water heaters run out of water after some demands, they can be used for one shower or can satisfy only few demands.
A tank-less water heater will provide you hot water every time you demand as they generate hot water almost instantly.