ENERGY STAR Symbol

ENERGY STAR®
Qualifying Criteria for
Residential Dishwashers

Version 4.1

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Dishwashers must meet Canada's Energy Efficiency Regulations before they can qualify for ENERGY STAR in Canada.

The February 2011 revision of this product specification deletes the Tier 2 Version 4.1 qualification criteria and effective date. Tier 2 Version 4.1 requirements will be superseded by Version 5.0 requirements that are currently under development. The Tier 1 Version 4.1 requirements will remain in effect until the Version 5.0 specification effective date.

A product shall meet all of the identified criteria to earn the ENERGY STAR symbol.

1) Definitions

Below are the definitions of the relevant terms in this document.

  1. Residential Dishwasher:
    A cabinet-like appliance used in a residential setting which with the aid of water and detergent, washes, rinses, and dries (when a drying process is included) dishware, glassware, eating utensils, and most cooking utensils by chemical, mechanical and/or electrical means and discharges to the plumbing drainage system.

  2. Compact Dishwasher:
    A dishwasher with a capacity of fewer than eight place settings and six serving pieces.

  3. Standard Dishwasher:
    A dishwasher with a capacity of at least eight place settings and six serving pieces.

  4. Basic Model:
    Units of a given type of covered product (or class thereof) manufactured by one manufacturer that have electrical characteristics which are essentially identical and which do not have any differing physical or functional characteristics which affect energy and water consumption.

  5. Energy Factor:
    The Energy Factor (“EF”) expresses the number of cycles that can be powered with one kilowatt-hour (kWh) of energy. The greater the EF, the more efficient the dishwasher.

  6. Standby Power:
    The power consumed when the product is switched off or in a non-operational mode.

2) Scope

  1. Included Products:
    Products that meet the definition of a dishwasher as specified herein are eligible for ENERGY STAR. Only compact and standard dishwashers are eligible for ENERGY STAR.

  2. Excluded Products:
    Any product types not specifically defined in Section 2.A are not eligible for ENERGY STAR.

3) Qualification Criteria

  1. Energy and Water Consumption Requirements:
    Products that meet the definition of a dishwasher as specified herein are eligible for ENERGY STAR. Only compact and standard dishwashers are eligible for ENERGY STAR.

    Table 1: ENERGY STAR Criteria for Residential Dishwashers

    Product Type Tier 1 Tier 2
    Standard ≤ 324 kWh/year
    ≤ 21.96 litres per cycle
    (≤ 5.8 gallons per cycle)
    N/A
    Compact ≤ 234 kWh/year
    ≤ 15.14 litres per cycle
    (≤ 4.0 gallons per cycle)
    N/A

  2. Significant Digits and Rounding:
    Any product types not specifically defined in Section 2.A are not eligible for ENERGY STAR.

    1. All calculations shall be carried out with actual measured or observed values. Only the final result of a calculation shall be rounded. Calculated results shall be rounded to the nearest significant digit as expressed in the corresponding specification limit.

    2. Unless otherwise specified, compliance with specification limit shall be evaluated using exact values without any benefit from rounding.

4) Test Requirements

  1. A representative unit shall be selected for testing based on the definition for Basic Model provided in Section 1, above.

  2. When testing residential dishwashers, the following test methods shall be used to determine ENERGY STAR qualification:

    Table 2: Test Methods for ENERGY STAR Qualification

    ENERGY STAR Requirement Test Method Reference
    Energy Consumption
    (kWh/year)
    CSA/C373-04
    Water Consumption
    (gallons/cycle)

5) Effective Date

The ENERGY STAR Residential Dishwasher specification shall take effect on the dates specified in Table 3, below. To qualify for ENERGY STAR, a product model shall meet the ENERGY STAR specification in effect on the model’s date of manufacture. The date of manufacture is specific to each unit and is the date (e.g., month and year) on which a unit is considered to be completely assembled.

Table 3: Specification Effective Date

Tier 1 Tier 2
August 11, 2009 N/A

6) Future Specification Revisions

ENERGY STAR reserves the right to change the specification should technological and/or market changes affect its usefulness to consumers, industry, or the environment. In keeping with current policy, revisions to the specification are arrived at through industry discussions. In the event of a specification revision, please note that the ENERGY STAR qualification is not automatically granted for the life of a product model.