With conventional gas storage water heaters less than 50% of the fuel energy input reaches the point of use. To reduce the amount of energy needed for water heating, the builder can install highefficiency electric or gas water heaters. This results in reduced excess heating lost.
Install a high efficiency storage water heater that meets the Energy Factor (EF) or Uniform Energy Factor (UEF) requirements in the following table for gas or electric: operation:
- The builder must present documentation demonstrating compliance of criteria to the EarthCraft Technical Advisor prior to submitting project for certification.
- The EarthCraft Technical Advisor will review documentation provided by the builder and visually confirm compliance of criteria at final inspection.