Qualifying Criteria for
Commercial Ice Machines

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Commercial Ice Machines (Ice-Makers) must meet Canada's Energy Efficiency Regulations to 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

Provided below are definitions of the relevant terms in this document.1

  • A. Commercial Ice Machine:
    A factory-made assembly (not necessarily shipped in one package) consisting of a condensing unit and ice-making section operating as an integrated unit, with means for making and harvesting ice. It is an assembly that makes up to 1,814 kg (4,000 lbs) of ice per day at Standard Ratings Conditions, as defined in Section 4.6 of CAN/CSA C742-08, and may also include means for storing or dispensing ice, or both.

1Definitions for ice machine, IMH, RCU, and SCU adopted from CAN/CSA C742-08, Energy Performance of Automatic Icemakers and Ice Storage Bins.

Ice Machine Categories

  • B. Ice Making Head (IMH):
    A model with the ice-making mechanism and the condensing unit in a single package, but with a separate ice storage bin.

  • C. Remote Condensing Unit (RCU) or Split System Unit:
    A model in which the ice-making mechanism and condenser or condensing unit are in separate sections.

  • D. Self-Contained (SCU):
    A model in which the ice-making mechanism and storage compartment are in an integral cabinet.

  • E. Air-Cooled:
    An ice machine wherein motor driven fans or centrifugal blowers move air through the condenser to remove heat from the refrigerant.

  • F. Cubed:
    Cubed ice machines have an alternate freezing and harvesting period. Water is circulated over an evaporator where it freezes until cubes are fully formed. The cubed ice is then harvested and moved to storage. The ice may be in cube shape, or in a variation of a solid shape.

  • G. Flake:
    Flake ice machines produce ice continuously, usually in a barrel-shaped evaporator. An auger inside the evaporator scrapes ice off the sides into a storage bin.

  • H. Nugget:
    Nugget ice machines use the same process as flake machines but compress the ice flakes into nuggets.

2) Scope

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

  • B. Excluded Products:
    Ice machines that use water-cooled technology as well as flake and nugget ice machines are not eligible for ENERGY STAR

3) Qualification Criteria

A. Energy and Water Efficiency Requirements

Table 1: ENERGY STAR Requirements for Air-Cooled
Commercial Cubed Ice Machines
Equipment Type Harvest Rate, H
(lbs ice/day)
Energy Consumption
(kWh/100 lbs ice)
Potable Water Use Limit
(gal/100 lbs ice)
IMH < 450 ≤ 9.23 – 0.0077H ≤ 25.0
≥ 450 ≤ 6.20 – 0.0010H ≤ 25.0
RCU (without remote
< 1000 ≤ 8.05 – 0.0035H ≤ 25.0
≥1000 ≤ 4.64 ≤ 25.0
RCU (with remote
< 934 ≤ 8.05 – 0.0035H ≤ 25.0
≥ 934 ≤ 4.82 ≤ 25.0
SCU < 175 ≤ 16.7 – 0.0436H ≤ 35.0
≥175 ≤ 9.11 ≤ 35.0

Table 1: ENERGY STAR Requirements for Air-Cooled
Commercial Cubed Ice Machines
Equipment Type Harvest Rate, H
(kg ice/day)
Energy Consumption
(kJ/kg ice)
Potable Water Use Limit
(litres/kg ice)
IMH < 204 ≤ 732.5 – 1.34H ≤ 2.1
≥ 204 ≤ 491.0 – .174H ≤ 2.1
RCU (without remote
< 454 ≤ 637.5 – 0.611H ≤ 2.1
≥ 454 ≤ 367.5 ≤ 2.1
RCU (with remote
< 423 ≤ 637.5 – 0.611H ≤ 2.1
≥ 423 ≤ 381.7 ≤ 2.1
SCU < 79 ≤ 1322.6 – 7.61H ≤ 2.9
≥ 79 ≤ 721.5 ≤ 2.9

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 three significant digits.
  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. The representative model shall be equivalent to that which is intended to be marketed and labelled as ENERGY STAR. Qualification based on product family is not acceptable under this specification. Each individual model shall be tested and meet the requirements of this specification to be qualified as ENERGY STAR.
  2. When testing commercial ice machines, 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
(kJ/kg ice)
(kWh/100 lbs ice)

CAN/CSA C742-08, Energy Performance of Automatic Icemakers and Ice Storage Bins

Potable Water Use
(Litres/kg ice)
(gal/100 lbs ice)

5) Effective Date

The ENERGY STAR Commercial Ice Machine specification shall take effect on January 1, 2008. 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.

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.

Flake and Nugget Ice Machines
ENERGY STAR plans to revisit this specification once the revision processes for AHRI 810-2006 and ASHRAE 29 are complete. At that time, performance requirements for flake and nugget ice machines will be considered and shared with industry stakeholders for review and comment.