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.
Tankless water heater vs hot water heater.
Tankless units on the other hand can be a better fit for larger families where showers laundry and food preparation often happen simultaneously.
Tankless water heaters are more energy efficient for your homes because it is not constantly running to maintain hot water.
If you use lots of hot water daily around 86 gallons you might enjoy energy efficiency of an additional 8 to 14 percent.
Water heaters with tanks.
While tankless water heaters run more efficiently than storage tank water heaters replacing a tank water heater with a tankless can be expensive and the payback time can be longer than the warranty.
Often they can be mounted to the wall.
Homeowners with on demand tankless water heaters that use less than 41 gallons or less of hot water each day enjoy between 24 and 34 percent more energy efficiency than storage tank water heaters.
Propane tankless water heaters can typically achieve a hot water flow rate that s three times the flow rate from electric storage or heat pump water heaters.
Energy efficient according to consumerreports tankless water heaters on average are 22 percent more energy efficient than traditional water heaters.
One of the first things to consider is whether you should get a tank or tankless water heater.