Gas Water Heater Efficiency Ratings

The higher the ef value is the more efficient the water heater.

Gas water heater efficiency ratings.

The following is a list of water heater options by fuel or energy source. 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. Buying a water heater. 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.

Today it is headquartered in ashland city tenn. Fuel type and its availability in your area may narrow your water heater choices. As the result of recently updated efficiency standards water heaters under 55 gallons now have a 4 percent boost in efficiency while. An older measure of water heater overall efficiency that is being phased out due to new test methods for water heaters.

Exploring water heater options by fuel type. 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. 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. Going with the noritz nr662 od ng tankless water heater means that you have a thermal efficiency of 84 and energy factor 0 81.

Check our gas and electric water heater ratings for more. And manufactures gas electric hybrid and tankless water heaters. With water heaters you can select a tank water heater or a tankless water heater. 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.

Smith produced its first water heater in 1939. To help consumers in their water heater purchase decisions the department of energy has developed new industry standards.