2015 NAECA Standards for Gas & Electric Residential Tankless Water Heaters
The U.S. Department of Energy has increased the energy factor requirements for residential water heaters effective April 16th, 2015 through the National Appliance Energy Conservation Act (NAECA). This update of regulations will affect all manufacturers selling residential water heaters in the U.S. Residential water heaters include storage type units that store heated water in an insulated tank and instantaneous type units that heat water on demand.
These standards do not apply to electric water heaters under 20 gallons or instantaneous electric water heaters 2 gallons and above.
NAECA EF Requirements for Residential Water Heaters:
This chart shows the new requirements effective April 16, 2015
|Water Heater Product Classes Affected by Change||Rated Storage Volumes||NAECA Updated Energy Factor Requirements|
|Gas-fired||≥ 20 gal and ≤ 55 gal||0.675 – (0.0015 x Vs)|
|Gas-fired||> 55 gal and ≤ 100 gal||0.8012 – (0.00078 x Vs)|
|Oil-fired||≤ 50 gal||0.68 – (0.0019 x Vs)|
|Electric||≥ 20 gal and ≤ 55 gal||0.960 – (0.0003 x Vs)|
|Electric||> 55 gal and ≤ 120 gal||2.057 – (0.00113 x Vs)|
|Instantaneous Gas-fired||< 2 gal||0.82 – (0.0019 x Vs)|
|Instantaneous Electric*||< 2 gal||0.93 – (0.00132 x Vs)|
Vs: Rated Storage Volume - the water storage capacity of a water heater (in gallons).
*Rated Storage Volume - (0 gallons for Bosch tankless water heaters)
List of high efficiency residential tankless Bosch Products already complying with the new April 2015 standards:
Bosch utilizes innovative energy efficiency approaches that make our tankless water heaters among the best available. The products listed below already meet or exceed the new NAECA standards.
|Gas Tankless||NACECA Standard, April 15th, 2015:||EF .82|
|Electric Tankless||NAECA Standard April 15th, 2015:||EF .93|
If you have questions or concerns about specifying or installing Bosch residential tankless water heaters, please contact your local Bosch Sales Representative or call Customer Support at 1-866-642-3198
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