ENERGY STAR Symbol

ENERGY STAR®
Qualifying Criteria
for Dehumidifiers

Version 2.1

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Residential dehumidifiers must meet Canada's Energy Efficiency Regulations before they can qualify for the ENERGY STAR symbol in Canada.

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

1) Definitions

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

  • A. Dehumidifier
    A self-contained, electrically operated, and mechanically encased assembly consisting of: (a) a refrigerated surface (evaporator) that condenses moisture from the atmosphere; (b) a refrigerating system, including an electric motor; (c) an air-circulating fan; and (d) means for collecting and/or disposing of the condensate.

  • B. Capacity
    Capacity refers to water removal capacity at standard test conditions, measured in litres (pints) per day. Capacity shall be calculated according to the test method provided in Section 4.

  • C. Energy Factor
    The energy efficiency of dehumidifiers will be measured in litres of water removed per kilowatt-hour (kWh) of energy consumed at standard test conditions. This metric is defined as the energy factor. Energy factor shall be calculated according to the test method provided in Section 4.

  • D. Product Family
    A group of models with similar basic design or water removal capacity and/or energy factor.

2) Scope

A. Included Products
Products that meet the definition of a dehumidifier as specified herein are eligible for ENERGY STAR qualification, with the exception of products listed in Section 2.B.

B. Excluded Products
Dehumidifiers with daily water-removal capacities greater than 87.5 litres (185 US pints) are not eligible for ENERGY STAR.

3) Qualification Criteria

A. Energy Efficiency Requirements
To qualify for ENERGY STAR, dehumidifiers shall meet the energy factor requirements provided in Tables 1 - 3, below.

Table 1: Tier 1 Criteria for ENERGY STAR Qualified Dehumidifiers
Product Capacity Energy Factor Under Test
Conditions (L/kWh)
(litres/day) (pints/day)
≤ 11.8

≤ 25

≥ 1.20

> 11.8 to ≤ 16.6

> 25 to ≤ 35

≥ 1.40

> 16.6 to ≤ 21.3

> 35 to ≤ 45

≥ 1.50

> 21.3 to ≤ 25.5

> 45 to ≤ 54

≥ 1.60

> 25.5 to ≤ 35.5

> 54 to ≤ 75

≥ 1.60

>35.5 to < 87.5

>75 to < 185

> 2.50

Requirements for Tier 2 are identical to those under Tier 1, except for models with a capacity of 35.5 litres/day (75 pints/day). As of October 1, 2007, 35.5 litre (75 pint) models move to the next capacity bin for qualification. This means they will need to have an energy factor of ≥ 2.50 L/kWh to earn the ENERGY STAR mark.

Table 2: Tier 2 Criteria for ENERGY STAR Qualified Dehumidifiers
Product Capacity Energy Factor Under Test
Conditions (L/kWh)
(litres/day) (pints/day)
≤ 11.8

≤ 25

≥ 1.20

> 11.8 to ≤ 16.6

> 25 to ≤ 35

≥ 1.40

> 16.6 to ≤ 21.3

> 35 to ≤ 45

≥ 1.50

> 21.3 to ≤ 25.5

> 45 to ≤ 54

≥ 1.60

> 25.5 to < 35.5

> 54 to ≤ 75

≥ 1.60

≥35.5 to ≤ 87.5

≥75 to ≤ 185

≥ 2.50

Requirements for Tier 3 of the ENERGY STAR specification for dehumidifiers are identical to those under Tier 2, except for products in the > 25.5 to < 35.5 litres/day (> 54 to < 75 pints/day) capacity bin. As of June 1, 2008, products with a capacity of > 25.5 to < 35.5 litres/day (> 54 to < 75 pints/day) will need to have an energy factor of ≥ 1.80 L/kWh to earn the ENERGY STAR mark.

Table 3: Tier 3 Criteria for ENERGY STAR Qualified Dehumidifiers
Product Capacity Energy Factor Under Test
Conditions (L/kWh)
(litres/day) (pints/day)
≤ 11.8

≤ 25

≥ 1.20

> 11.8 to ≤ 16.6

> 25 to ≤ 35

≥ 1.40

> 16.6 to ≤ 21.3

> 35 to ≤ 45

≥ 1.50

> 21.3 to ≤ 25.5

> 45 to ≤ 54

≥ 1.60

> 25.5 to < 35.5

> 54 to ≤ 75

≥ 1.80

≥35.5 to ≤ 87.5

≥75 to ≤ 185

≥ 2.50

B. Significant Digits and Rounding

  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. Representative Models shall be selected for testing per the following requirements:

  1. For qualification of an individual product model, the representative model shall be equivalent to that which is intended to be marketed and labelled as ENERGY STAR.
  2. For qualification of a product family, any model within that product family can be tested and serve as the representative model.

  1. When testing dehumidifiers, the following test methods shall be used to determine ENERGY STAR qualification:
Table 4: Test Methods for ENERGY STAR Qualification
ENERGY STAR Requirement Test Method Reference
 Energy Factor CAN/CSA-C749-09 "Performance of Dehumidifiers"

Additional Test Conditions
A watt-hour meter shall be used to measure dehumidifier energy consumption during the capacity rating test. The watt-hour meter shall be accurate within 0.5 percent of the indicated value and have a scale with graduations of 1 watt-hour or less.

5) Effective Date

This ENERGY STAR Dehumidifier Specification shall take effect on the dates specified in Table 5, below. To qualify for ENERGY STAR, a product model shall meet the ENERGY STAR specification in effect on the 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 5: Specification Effective Dates
Tier 1 Tier 2 Tier 3
October 1, 2006 October 1, 2007 June 1, 2008

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.