Going with the noritz nr662 od ng tankless water heater means that you have a thermal efficiency of 84 and energy factor 0 81.
Gas water heater efficiency ratings.
With water heaters you can select a tank water heater or a tankless water heater.
To help consumers in their water heater purchase decisions the department of energy has developed new industry standards.
Today it is headquartered in ashland city tenn.
Due to inconsistent unreliable interpretations of high efficiency ef ratings across national brands all water heating manufactururers are now required to comply with the new doe testing procedures and rating standards.
Fuel type and its availability in your area may narrow your water heater choices.
And manufactures gas electric hybrid and tankless water heaters.
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.
Smith produced its first water heater in 1939.
The higher the ef value is the more efficient the water heater.
Efficiency standards for gas and electric water heaters are different but both use the uniform energy factor uef ratings system where higher scoring units produce more hot water while using less energy.
The fuel used by a water heating system will not only affect annual operation costs but also the water heater s size and energy efficiency.
Check our gas and electric water heater ratings for more.
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Top 10 best gas water heater in 2020 ultimate reviews and buying guide august 25 2019 june 21 2020 by brent collins based on a number of water heating options available the use of gas powered water heaters is among the popular ones.
But also comes with a 12 year warranty for the heat exchanger 5 year parts warranty and a year warranty for labor making this perhaps the best residential water heater on the planet.
Buying a water heater.
Exploring water heater options by fuel type.