They use less energy than standard models saving homeowners money on their utility bills while helping protect the climate.
Water heater energy factor vs thermal efficiency.
The term is used by the united states department of energy to develop and enforce minimum energy conservation standards under.
Energy star certified water heaters are an easy choice for energy savings performance and reliability.
That means that 58 60 of the energy that is being used to heat your water is effectively converted into heat.
The energy factor is currently used for rating the efficiency of water heaters dishwashers clothes washers and clothes dryers.
On the contrary thermal efficiency is the amount of energy delivered as heated water compared to the energy consumption of the water heater.
Water heaters are the second highest source of energy usage in the home.
The two figures are related but different.
Energy factor calculates the amount of energy delivered as hot water compared to the energy consumption of a residential water heater over a 24 hour period.
An energy factor is a metric used in the united states to compare the energy conversion efficiency of residential appliances and equipment.
The new uef standard affects more than just the efficiency number itself.
Use the energy factor to determine the energy efficiency of a storage tankless or demand type water heater or heat pump water heater.
Examples of performance factors impacted by uef include.
The higher the ef value is the more efficient the water heater.
Expressed as a decimal the uniform energy factor is determined by running a department of energy specified simulated use test sut.
Ef is determined by the department of energy s test method outlined in the 10 cfr parts 200 to 499 edition revised as of january 1 2014.
An older measure of water heater overall efficiency that is being phased out due to new test methods for water heaters.
They can be 8 14 more energy efficient for homes that use a lot of hot water around 86 gallons per day.
Add up your savings.
The uniform energy factor.
Adjustments in new doe testing procedures now impact water heating performance stats associated with the amount of hot water produced in a real world situation to the length of typical showers.
Most new water heaters have an efficiency factor ef of 58 60.
That means that 58 60 of the energy that is being used to heat your water is effectively converted into heat.
The energy factor ef indicates a water heater s overall energy efficiency based on the amount of hot water produced per unit of fuel consumed over a typical day.
For homes that use 41 gallons or less of hot water daily demand water heaters can be 24 34 more energy efficient than conventional storage tank water heaters.
Added smart features like exclusive water leak detection alerts and vacation setting plus energy cost savings and our 10 year warranty all add up for a quick payback in less than two years 11 and big savings over the life of the water heater.
