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Personal: Residential

Energy Star Most Efficient

Eligibility for Recognition – Clothes Washers


Included products: Standard sized residential clothes washers are eligible for recognition.

Excluded products: The following products are not eligible for Most Efficient recognition in 2011:

  • Compact clothes washers (volume under 1.6 cubic feet)
  • All-in-one combination washer-dryers
  • Commercial clothes washers
Recognition Criteria
  1. Product must be ENERGY STAR qualified consistent with applicable ENERGY STAR Participant Commitments and the requirements set forth in the latest version of the ENERGY STAR Program Requirements Product Specification for Clothes Washers, Version 5.1. Product performance must be certified by an EPA-recognized Certification Body.

  2. Product must meet applicable Modified Energy Factor (MEF) and Water Factor (WF) requirements shown in the table below:
Clothes Washer Volume MEF WF
≤ 2.5 cubic feet ≥ 2.3 ≤ 4.5
> 2.5 cubic feet ≥ 3.0 ≤ 3.3

Recognition Period

Upon notification from an ENERGY STAR Participant, NRCan will add qualifying models to the 2011 Most Efficient product list for clothes washers through December 31, 2011. The 2011 Most Efficient designation may be used in association with models recognized during this period for as long as the model remains on the market.