Navigating the National Appliance Energy Conservation Act
As of April 2015, the minimum efficiency levels of gas-fired and electric water heaters will increase. Gas-fired, residential, tank-type water heaters now have minimum Energy Factors (EFs) ranging from 0.48 for 100-gal. models to 0.59 for 40-gal. models. Next year, the minimum EFs go to 0.72 for 100-gal. models and 0.62 for 40-gal. models. Residential electric water heaters that are less than 55 gallons will have to meet new EFs around 0.94 or 0.95, increasing from today’s standards, which range from 0.90 to 0.94. However, any residential, tank-type, electric water heater that is more than 55 gallons will have to meet EFs as high as 1.99.