According to energy gov for homes that use 41 gallons or less of hot water daily demand or tankless water heaters can be 24 to 34 more energy efficient than conventional storage tank water heaters.
Tankless hot water heater vs tank.
The operational life of a tankless water heater is usually 20 years if not more.
It uses high powered burners to rapidly heat water as it runs through a heat exchanger and deliver it directly to your faucets or shower without storing it in a tank.
Tankless water heaters if gas fired will save homeowners over 100 annually the longer they remain in service.
Tankless water heaters are more compact and can heat up water as you use it.
For a tank based traditional hot water system the lifespan is usually 10 years.
Water heaters with tanks.
And storage tank water heaters while less expensive up front don t last as long as tankless options.
One of the first things to consider is whether you should get a tank or tankless water heater.
Instead they heat water as it passes through the unit using a heat exchanger to rapidly bring it.
As their name implies tankless or on demand water heaters don t store water in a tank.
Either a gas burner or an electric element heats the water.