EPA suspended the ENERGY STAR Transformers specification effective May 1, 2007. In EPACT 2005, Congress passed a new minimum federal efficiency standard for transformers at the same level as the ENERGY STAR specification. All transformers manufactured on or after January 1, 2007 must meet these new criteria.

Materials related to the ENERGY STAR suspension decision

Documents Related to the Transformers Specification

Stakeholder Comments on Proposed Suspension of the Transformers Specification