ENERGY STAR Symbol

ENERGY STAR®
Qualifying Criteria for
Commercial Refrigerators and Freezers

Version 2.1 – January 2011

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Commercial refrigerators and freezers must meet Canada’s Energy Efficiency Regulations, as applicable, 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

A. Commercial Food-Grade Refrigerator
A refrigeration cabinet designed for storing food products at temperatures above
0°C (32°F) but no greater than 4.4°C (40°F) and intended for commercial use. For purposes of ENERGY STAR qualification, set-point temperatures must represent as shipped conditions.

B. Commercial Food-Grade Freezer
A refrigeration cabinet designed for storing food products at temperatures of
-17.8°C (0°F) and intended for commercial use. For purposes of ENERGY STAR qualification, set-point temperatures must represent as shipped conditions.

C. Refrigeration Cabinet
A refrigerator or freezer used for storing food products at specified temperatures, with the condensing unit and compressor built into the cabinet, and designed for use by commercial or institutional facilities, other than laboratory settings. These units may be vertical or chest configurations and may contain a worktop surface.

D. Closed Refrigerator
A display or holding refrigerator where product is accessible for removal by opening or moving doors or panels1.

1Definition from AHRI Standard 1200-2010, Performance Rating of Commercial Refrigerated Display Merchandisers and Storage Cabinets, Air-Conditioning, Heating, and Refrigeration Institute

E. Solid Door Cabinet
A commercial food-grade refrigerator or freezer in which all outer doors on all sides of the unit are solid doors. These doors may be sliding or hinged.

F. Glass Door Cabinet
A commercial food-grade refrigerator or freezer in which all outer doors on at least one side of the unit are glass doors. These doors may be sliding or hinged.

G. Mixed Solid/Glass Door Cabinet
A commercial food-grade refrigerator or freezer in which all outer doors on at least one side of the unit are a combination of solid and glass doors. A unit which has all glass doors on one side and a combination of solid and glass doors on another is considered a glass door cabinet

H. Solid Door
Less than 75% of the front surface area is glass.

I. Glass Door
Greater than, or equal to, 75% of the front surface area is glass.

J. Worktop Surface
A solid working surface. The working surface may be a cutting board, a stainless steel work surface, or a stone slab. This surface may not add to the total energy consumption of the unit.

K. Chest Configuration
An enclosed refrigeration cabinet to which access is gained only through a top-opening door.

L. Product Family
Variations of one model offered within a single product line with differences in aesthetics only. Individual models represented by a product family must be based on the same basic engineering design and have the same energy consumption. Examples of acceptable aesthetic differences include external finish, color, or door opening orientation (left-opening versus right-opening).

2) Scope

A. Included Products
Products that meet the definitions of a Commercial Food-grade Refrigerator and Commercial Food-grade Freezer as specified herein are eligible for ENERGY STAR qualification, with the exception of products listed in Section 2.B.

Examples of product types that are eligible for qualification include: reach-in, roll-in, or pass-through units; merchandisers; undercounter units; milk coolers; back bar coolers; bottle coolers; glass frosters; deep well units; beer-dispensing or direct draw units; and bunker freezers.

To be eligible for this specification, solid and glass door refrigerators and freezers shall be commercial-grade and therefore, certified to the applicable Canadian quality and safety standards.
B. Excluded Products
Drawer cabinets, prep tables, deli cases, open air units and laboratory-grade refrigeration equipment are not eligible for ENERGY STAR.

3) Qualification Criteria

A. Maximum Daily Energy Consumption Requirements

Table 1: ENERGY STAR Requirements for Commercial Food-grade Refrigerators and Freezers
Product Volume (in cubic feet) Refrigerator Freezer
Vertical Configuration
Solid Door Cabinets
0 < V < 15 ≤ 0.089V + 1.411 ≤ 0.250V + 1.250
15 ≤ V < 30 ≤ 0.037V + 2.200 ≤ 0.400V – 1.000
30 ≤ V < 50 ≤ 0.056V + 1.635 ≤ 0.163V + 6.125
50 ≤ V ≤ 0.060V + 1.416 ≤ 0.158V + 6.333
Glass Door Cabinets    
0 < V < 15 ≤ 0.118V + 1.382 ≤ 0.607V + 0.893
15 ≤ V < 30 ≤ 0.140V + 1.050 ≤ 0.733V – 1.000
30 ≤ V < 50 ≤ 0.088V + 2.625 ≤ 0.250V + 13.500
50 ≤ V ≤ 0.110V + 1.500 ≤ 0.450V + 3.500
Chest Configuration
Solid or Glass Door
Cabinets
≤ 0.125V + 0.475 ≤ 0.270V + 0.130

Table 1: ENERGY STAR Requirements for Commercial Food-grade Refrigerators and Freezers
Product Volume (in litres) Refrigerator Freezer
Vertical Configuration
Solid Door Cabinets    
0 < V < 425 ≤ .00314V + 1.411 ≤ .00883V + 1.250
425 ≤ V < 850 ≤ .00131V + 2.200 ≤ .0141V - 1.000
850 ≤ V < 1415 ≤ .00198V + 1.635 ≤ .00576V + 6.125
1415 ≤V ≤ .00212V + 1.416 ≤ .00558V + 6.333
Glass Door Cabinets    
0 < V < 425 ≤ .00417V + 1.382 ≤ .02144V + 0.893
425 ≤ V < 850 ≤ .00494V + 1.050 ≤ .02589V - 1.000
850 ≤ V < 1415 ≤ .00311V + 2.625 ≤ .00883V + 13.500
1415 ≤ V ≤ .00388V + 1.500 ≤ .01589V + 3.500
Chest Configuration
Solid or Glass Door
Cabinets
≤ 0.00441V + 0.475 ≤ .00953V + 0.130
  1. AHAM Volume
The interior volume (V) of a refrigerator or freezer shall be calculated by AHAM Standard Household Refrigerators/Household Freezers (ANSI/AHAM HRF-1-2004)2.

2Definition from AHRI Standard 1200-2010, Performance Rating of Commercial Refrigerated Display Merchandisers and Storage Cabinets, Air-Conditioning, Heating, and Refrigeration Institute.
  1. Determining Maximum Daily Energy Consumption for Mixed Solid/Glass Door Cabinets
This section applies to mixed solid/glass door cabinets designed with two or more compartments contained in a single cabinet with different exterior door types (i.e., one is glass and one is solid) on the same side of the cabinet. The maximum daily energy consumption (MDEC) of mixed solid/glass door cabinets shall be the sum of all individual compartment MDEC values. For purposes of mixed solid/glass door cabinets, compartments are defined by the volume associated with the different exterior door types. The interior of these compartments may or may not be physically separated.

The volume of each individual compartment shall be measured, and its MDEC limit determined, based on the compartment's volume and door type, as listed in Table 1. The sum of the volumes of each compartment must be equivalent to the total AHAM volume of the cabinet.

Example: Consider a vertically-configured refrigeration cabinet with a total volume of 50 cubic feet (1415 litres) with one glass half door and one solid half door on the same side. The MDEC of the equipment would be the sum of the MDEC for the two compartments. The requirement used to calculate the MDEC for each compartment is based on the compartment's volume and door type:

Glass Door MDEC:
(25 cu. ft. X 0.140) + 1.050 = 4.55 kWh/day
(707.92 litres X .00494) + 1.050 = 4.55 kWh/day

Solid Door MDEC:
(25 cu. ft. X 0.037) + 2.200 = 3.13 kWh/day
(707.92 litres X .00131) + 2.200 = 3.12 kWh/day

MDEC for entire cabinet: 4.55 kWh/day + 3.13 kWh/day = 7.68 kWh/day
  1. 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 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 commercial refrigerators and freezers, 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
MDEC AHRI Standard 1200-2010 "Performance Rating of Commercial Refrigerated Display Merchandisers and Storage Cabinets"

Note: Only those test procedures in AHRI Standard 1200-2010 relevant to closed refrigerators are applicable to this specification. Total energy consumption of the product shall be measured, which includes both the auxiliary energy and refrigeration energy consumption.

C. Testing Temperature
The following integrated average temperatures, based on AHRI Standard 1200-2010, shall be used when testing commercial refrigerators and freezers for ENERGY STAR qualification:
Table 3: Required Integrated Average Temperatures for Testing
Product Type Integrated average product temperature
Commercial food-grade refrigerator 3.3° ± 1.1°C (38° ± 2°F)
Commercial food-grade freezer -17.8° ± 1.1°C (0° ± 2°F)
D. Additional Testing Conditions
In addition to the testing conditions presented in AHRI Standard 1200-2010, equipment shall be tested:
  1. With all standard, factory-installed accessories (lighting, perimeter heat, pan heater, etc.) in the "ON" position, if manually-controlled.

  2. With all accessories, such as electric condensate pans, that come standard with equipment, but not necessarily factory-installed, installed and in the "ON" position.

  3. With power management device disabled if power management capabilities can vary upon shipment to customer.
E. Power Management Devices
Equipment with energy management devices permanently installed, such that the operator is not able to adjust the settings, may be operational during the test period, if the energy management device will never change to a new integrated average product temperature during the test period. Manufacturers can refer to ANSI/ASHRAE Standard 72-2005 and its official interpretations for further guidance on power management devices.

5) Effective Date

The ENERGY STAR Commercial Refrigerator and Freezer specification shall take effect on January 1, 2010. To qualify for ENERGY STAR, a product model must 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 on which a unit is considered to be completely assembled.

Glass Door Cabinets: Glass door cabinets, as defined in Section 1 above, that meet the requirements of this specification may begin qualifying for ENERGY STAR on April 1, 2009.

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 stakeholder discussions. In the event of a specification revision, please note that ENERGY STAR qualification is not automatically granted for the life of a product model.

  1. Drawer Cabinets: ENERGY STAR will monitor industry efforts to develop a test procedure to measure and compare the energy performance of refrigerated drawer cabinets. Based on the availability of an industry accepted test procedure and performance data, ENERGY STAR may consider adding this product category in future versions of this specification.

  2. Laboratory Grade Refrigerators and Freezers: ENERGY STAR is currently working with manufacturers of laboratory grade refrigerators and freezers to develop separate requirements for equipment designed for and used in laboratory environments. Once these requirements are finalized, ENERGY STAR may amend this specification to include laboratory grade refrigerators and freezers.