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Water heater energy factor vs thermal efficiency.
Water heaters are the second highest source of energy usage in the home.
What energy efficiency rating factors have changed.
On the contrary thermal efficiency is the amount of energy delivered as heated water compared to the energy consumption of the water heater.
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They use less energy than standard models saving homeowners money on their utility bills while helping protect the climate.
The higher the ef value is the more efficient the water heater.
Most new water heaters have an efficiency factor ef of 58 60.
They can be 8 14 more energy efficient for homes that use a lot of hot water around 86 gallons per day.
That means that 58 60 of the energy that is being used to heat your water is effectively converted into heat.
An older measure of water heater overall efficiency that is being phased out due to new test methods for water heaters.
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.
The uniform energy factor.
The uniform energy factor for residential and certain commercial water heaters refers to its efficiency when run under standardized conditions for a 24 hour period.
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Expressed as a decimal the uniform energy factor is determined by running a department of energy specified simulated use test sut.
The two figures are related but different.
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.
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.
Use the energy factor to determine the energy efficiency of a storage tankless or demand type water heater or heat pump water heater.
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The new uef standard affects more than just the efficiency number itself.
An energy factor is a metric used in the united states to compare the energy conversion efficiency of residential appliances and equipment.
The term is used by the united states department of energy to develop and enforce minimum energy conservation standards under.
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.
