Starting April 15, 2015 the new energy requirements will affect all types of water heaters by raising the energy factor requirements.
There requirements for gas tanks will be the following.
Gas Water Heaters
55 gallons and under .61 Energy Factor
55 gallons and over .76 Energy Factor
Electric Water Heaters
55 gallons and under .95 Energy Factor
55 gallons and over 2.0 Energy Factor
Gas fired Tankless
.82 Energy Factor
Posted in: Efficiency