Notice: Starting June 12, 2017, the Department of Energy (DOE) implemented new energy efficiency standards for water heaters. The old metric was Energy Factor, or EF. The new metric is UEF or Uniform Energy Factor. They are not the same.
Because the UEF metric is new, customers may purchase a water heater that was certified with EF rating criteria. Models that were rated with EF will be honored in our rebate program through 12/31.2017. After this date, all rebates will be issued based on the AHRI database certification UEF criteria.