If you are replacing a hot water tank with another hot water tank it s usually a fairly inexpensive installation.
Tankless water heater vs hot water tank.
Tankless water heaters reduce energy use up to 25 but they cost twice as much as standard storage units.
This is known as point of use and allows high water demand appliance such as dishwashers to have their own supply.
The cost of a hot water tank is about 60 less than than of a tankless heater.
The life expectancy of a conventional hot water tank is about 12 to 15 years.
With regular maintenance and repairs a tankless system may last up to 30 years or up to 3 times longer than a traditional hot water heater.
Tankless water heaters do cost more than water tanks but you do get these advantages.
According to energy research done by energy gov if you are using a 40 gallon tank of hot water or less your energy demand is typically less than 50 percent with a tankless water heater compared to a water heater tank.
If you use lots of hot water daily around 86 gallons you might enjoy energy efficiency of an additional 8 to 14 percent.
You aren t paying to store a huge tank of water while you re away at work or at night when you re sleeping.
Otherwise installing a tankless water heater that is used only for one appliance is another solution.
Hot water tank pros.
For a tank based traditional hot water system the lifespan is usually 10 years.
The main difference between tankless water heaters and hot water tanks is that tankless models only use energy when you turn on the tap.