Upcoming ENERGY STAR Criteria for domestic hot water systems from ENERGY STAR Residential Water Heaters: Second Draft Criteria Analysis and Proposal, Oct 2007.

ENERGY STAR is not considering electric-resistance storage water heaters for inclusion in the program. Stakeholders have indicated the savings are too insignificant as the primary reason for exclusion. In addition, stakeholders have suggested that electric resistance technology is highly inefficient over the full fuel cycle and it potentially increases total energy consumption and emissions. Given stakeholder input, electric resistance water heaters are not appropriate for inclusion in ENERGY STAR.

ENERGY STAR is considering high-performance gas (natural gas and propane) storage water heaters for inclusion in the program. The proposed criteria are:

ENERGY STAR is considering residential gas condensing water heaters for inclusion in the program. The proposed criteria are:

ENERGY STAR is considering whole-home gas tankless water heaters for inclusion in the program. The proposed criteria are:

ENERGY STAR is considering solar water heaters for inclusion in the program. The proposed criteria are:

ENERGY STAR is considering drop-in or integrated heat pump water heaters for inclusion in the program. The proposed criteria are: