do tankless water heaters last longer
How does a Tank Water Heater work? Tank water heaters are heated by natural gas, propane gas, or electricity. There is no difference in the lifespan whether it is natural gas, propane or an electric water heater. Tankless water heaters have a longer lifespan of 20+ years. Water heater tanks are made out of a metal that has a sprayed-on glass lining. Inside the tank there is an anode rod, which is called the sacrificial rod in many instances.