1 | Program Name or Ancillary Text eere.energy.gov

The Parker Ranch installation in Hawaii

BUILDING TECHNOLOGIES PROGRAM

Energy Conservation Program for 

Appliance Standards:

Test Procedure NOPR Public Meeting for 

Refrigerators, Refrigerator-Freezers, and 

Freezers

June 22, 2010

Department of Energy

Energy Efficiency & Renewable Energy
2 2Building Technologies Program | Program Name or Ancillary Text eere.energy.gov

• Present the Department’s proposed test procedures for 

refrigerators, refrigerator-freezers, and freezers

• Seek comment from participants on the proposed test 

procedures

• Discuss specific issues or questions related to the 

proposal

• Discuss the next steps for the rulemaking

Purpose of the Test Procedure NOPR Public Meeting

Introduction
3 3Building Technologies Program | Program Name or Ancillary Text eere.energy.gov

• NOPR issued by DOE on May 27, 2010

• NOPR Public Meeting today, June 22, 2010

• Comments on NOPR from interested parties

– Transcript records oral comments from today’s public meeting

– Written comments (comment period closes 75 days after 

publication in the Federal Register)

• DOE reviews and considers all comments

• Final Rule Publication

– Final Rule is expected to be issued by December 31, 2010

Steps in the Test Procedures Rulemaking

Final

Rule

Introduction

NOPR
4 4Building Technologies Program | Program Name or Ancillary Text eere.energy.gov

A. Products Covered by the Test Procedure Changes

B. Combination Wine Storage-Freezer Products 

C. Establishing New Appendices A and B, and Compliance Date for the Amended Test 

Procedure

D. Amendments Required for Testing Prior to New Energy Standard Compliance Date

E. Amendments Required for Testing on/after New Energy Standard Compliance Date

F. Other Issues Under Consideration

G. Compliance with Other EPCA Requirements

Test Procedure Overview and Issues

Introduction
5 5Building Technologies Program | Program Name or Ancillary Text eere.energy.gov

• Workshop participants are invited to provide 

summary comments or statements

• Participants are also invited to raise their issues on 

the Test Procedure NOPR for discussion today

Comments and Issues from Participants

Introduction
6 6Building Technologies Program | Program Name or Ancillary Text eere.energy.gov

Citation Date Description

Test Procedure Final Rules

42 FR 46140 9/14/1977 Test procedure established.

47 FR 34517 8/10/1982 Revised Test Procedure based on AHAM-HRF1-1979

54 FR 36238 8/31/1989 Variable Defrost Control, Dual System Defrost

68 FR 10957 3/7/2003 Long-time Defrost Test Procedure Modification

Waivers Recently Granted

72 FR 20333 4/24/2007 Liebherr: Wine storage-freezer products

73 FR 10425 2/27/2008 GE: Variable Anti-Sweat

74 FR 20695 5/5/2009 Whirlpool: Variable Anti-Sweat

74 FR 66338 12/15/2009 Electrolux: Variable Anti-Sweat

Regulatory History: Refrigerator and Refrigerator-Freezer Test Procedure

Introduction

Note: Additional waivers and interim waivers for variable anti-sweat control have been granted, 

extending the control to more products and at least two more manufacturers (Samsung and Haier).
7 7Building Technologies Program | Program Name or Ancillary Text eere.energy.gov

Federal

Register 

Reference

Date Actions/Description

Test Procedure Final Rules

42 FR 46140 9/14/1977 Test procedure established.

47 FR 34517 8/10/1982 Revised Test Procedure based on AHAMHRF-1-1979

54 FR 36238 8/31/1989 Variable Defrost Control, Quick Freeze

Regulatory History: Freezer Test Procedure

Introduction

Note: No petitions for waiver have been received since the 1989 final rule.
8 8Building Technologies Program | Program Name or Ancillary Text eere.energy.gov

• Energy Independence and Security Act of 2007 (EISA 2007) 

Amendments to the Energy Policy and Conservation Act (42 

U.S.C. 6291 et seq.)

– DOE must publish by December 31, 2010 either a determination 

indicating that new energy conservation standards are not 

needed, or an energy conservation standard final rule.

• Some of the proposed test procedure amendments will 

require modification of the energy conservation standards, 

since they affect measured energy consumption.

Regulatory History – Continued

Introduction
9 9Building Technologies Program | Program Name or Ancillary Text eere.energy.gov

Test Procedure Overview

A. Products Covered by the Test Procedure Changes

B. Combination Wine Storage-Freezer Products 

C. Establishing New Appendices A and B, and Compliance Date for the Amended Test 

Procedure

D. Amendments Required for Testing Prior to New Energy Standard Compliance Date

E. Amendments Required for Testing on/after New Energy Standard Compliance Date

F. Other Issues Under Consideration

G. Compliance with Other EPCA Requirements
1010Building Technologies Program | Program Name or Ancillary Text eere.energy.gov

• The proposed test procedure amendments cover 

refrigerators, refrigerator-freezers, and freezers. 10 CFR 

430.2 provides the following definitions:

– “Refrigerator” means an electric refrigerator.

– “Refrigerator-freezer” means an electric refrigerator-freezer.

– “Electric refrigerator” means a cabinet designed for the

refrigerated storage of food at temperatures above 32  ̊F and 

below 39  ̊F, configured for general refrigerated food storage, 

and having a source of refrigeration requiring single phase, 

alternating current electric energy input only. An electric 

refrigerator may include a compartment for the freezing and 

storage of food at temperatures below 32  ̊F, but does not 

provide a separate low temperature compartment designed 

for the freezing and storage of food at temperatures below 

8 ̊F.

Products Covered by the Test Procedure Changes

Covered Products 
1111Building Technologies Program | Program Name or Ancillary Text eere.energy.gov

• 10 CFR 430.2 provides the following definitions:

– “Electric refrigerator-freezer” means a cabinet which consists of 

two or more compartments with at least one of the 

compartments designed for the refrigerated storage of food at 

temperatures above 32  ̊F and with at least one of the 

compartments designed for the freezing and storage of food at 

temperatures below 8  ̊F which may be adjusted by the user 

to a temperature of 0  ̊F or below. The source of refrigeration 

requires single phase, alternating current electric energy input 

only.

– “Freezer” means a cabinet designed as a unit for the freezing 

and storage of food at temperatures of 0  ̊F or below, and 

having a source of refrigeration requiring single phase, 

alternating current electric energy input only.

Products Covered by the Test Procedure Changes, continued

Covered Products 
1212Building Technologies Program | Program Name or Ancillary Text eere.energy.gov

Issue 1: Electric Refrigerator Definition

DOE requests comment on whether any clarifications are needed 

regarding the definition for electric refrigerators. If so, please explain 

why and provide specific language that should DOE add.

Covered Products

Request for Comment on the Definition of Electric Refrigerator
1313Building Technologies Program | Program Name or Ancillary Text eere.energy.gov

Test Procedure Overview

A. Products Covered by the Test Procedure Changes

B. Combination Wine Storage-Freezer Products 

C. Establishing New Appendices A and B, and Compliance Date for the Amended Test 

Procedure

D. Amendments Required for Testing Prior to New Energy Standard Compliance Date

E. Amendments Required for Testing on/after New Energy Standard Compliance Date

F. Other Issues Under Consideration

G. Compliance with Other EPCA Requirements
1414Building Technologies Program | Program Name or Ancillary Text eere.energy.gov

• DOE modified the definition of electric refrigerator to exclude wine 

storage products due to concerns about safe food storage 

temperatures. 66 FR 57845, November 19, 2001.

• The temperature range for refrigerators was bounded at the high 

end at 39  ̊F in this definition change.

• As suggested by stakeholders at the 12/10/09 Energy 

Conservation Standard Preliminary Analysis meeting, DOE may 

have authority to re-extend coverage to these products.

• In this rulemaking, DOE proposes to modify its electric 

refrigerator-freezer definition to make it consistent with the 

refrigerator definition:

“Electric refrigerator-freezer” means a cabinet which consists of 

two or more compartments with at least one of the compartments 

designed for the refrigerated storage of food at temperatures 

above 32  ̊F and below 39 ̊F and with at least one . . . .”

Wine Storage-Freezer Products

DOE proposes to address wine storage and combination wine storagefreezer products in a separate future rulemaking.
1515Building Technologies Program | Program Name or Ancillary Text eere.energy.gov

Request for Comment on Wine Storage-Freezer Products

Issue 17: Combination Wine Storage-Freezer Products

DOE invites comment on its proposal to modify the definition of 

refrigerator-freezer to exclude products which combine a freezer and 

a wine storage compartment. 

Wine Storage-Freezer Products
1616Building Technologies Program | Program Name or Ancillary Text eere.energy.gov

Test Procedure Overview

A. Products Covered by the Test Procedure Changes

B. Combination Wine Storage-Freezer Products 

C. Establishing New Appendices A and B, and Compliance Date for the Amended Test 

Procedure

D. Amendments Required for Testing Prior to New Energy Standard Compliance Date

E. Amendments Required for Testing on/after New Energy Standard Compliance Date

F. Other Issues Under Consideration

G. Compliance with Other EPCA Requirements
1717Building Technologies Program | Program Name or Ancillary Text eere.energy.gov

• Two groups of proposed amendments, applicable for:

– Current energy conservation standards: amended versions of 

existing appendices A1 and B1

– Future (2014) energy conservation standards: new appendices A 

(for refrigerators and refrigerator-freezers) and B (for freezers)

• Proposed compliance date for both sets of test procedures:

30 days after publication of a TP final rule (expected by 

December 31, 2010).

• New Appendices A and B would not be required for 

determining compliance with standards until the new standards 

compliance date in 2014.

• Existing appendices A1 and B1 will be deleted from the CFR, 

after the new standards compliance date in 2014.

Compliance Date for the Amended Test Procedures

Compliance Date
1818Building Technologies Program | Program Name or Ancillary Text eere.energy.gov

Test Procedure Overview

A. Products Covered by the Test Procedure Changes

B. Combination Wine Storage-Freezer Products 

C. Establishing New Appendices A and B, and Compliance Date for the Amended Test 

Procedure

D. Amendments Required for Testing Prior to New Energy Standard Compliance Date

E. Amendments Required for Testing on/after New Energy Standard Compliance Date

F. Other Issues Under Consideration

G. Compliance with Other EPCA Requirements
1919Building Technologies Program | Program Name or Ancillary Text eere.energy.gov

Amendments Required for Testing Prior to New Energy 

Standard Compliance Date:

1. Procedures for Test Sample Preparation

2. Product Clearances to the Wall During Testing

3. Alternative Compartment Temperature Sensor Locations

4. Median Temperature Settings for Electronic Control Products

5. Test Procedures for Convertible Compartments and Special Compartments

6. Establishing a Temperature-Averaging Procedure for Auxiliary Compartments

7. Modified Definition for Anti-Sweat Heater

8. Testing with the Anti-Sweat Heater Switch Turned Off

9. Incorporation of Test Procedures for Products with Variable Anti-Sweat Heating Control 

Waivers

10. Modification of Long-Time and Variable Defrost Test Method to Capture Precooling Energy

11. Establishing Test Procedures for Multiple Defrost Cycle Types

12. Elimination of Part 3 of the Variable Defrost Test

13. Corrections and Other Test Procedure Language Changes

14. Including in Certification Reports Basic Information Clarifying Energy Measurements
2020Building Technologies Program | Program Name or Ancillary Text eere.energy.gov

Guidance for product setup to ensure that the test

is based on representative average use

Test Sample Preparation

 Future technology or product design features may make aspects of 

the proposed test procedures unclear or obsolete. 

 DOE proposes adding language to provide guidance to 

manufacturers regarding the intent of the test procedures.

• Requirement that test samples be set up consistent with the 

instructions shipped with the cabinet, except as clearly indicated in 

the test procedure (i.e. ambient temperature conditions).

• Explanation that the intent of the test procedure is to represent 

energy use in “normal” conditions that might not themselves be 

specified for the test.

 Requirement for petition for waiver if set up consistent with normal 

use is not possible or if application of the requirements to a 

particular new product are not clear.
2121Building Technologies Program | Program Name or Ancillary Text eere.energy.gov

Proposed Modified Language (430.23, (a) and (b)):

Test Procedure Intent

Test Sample Preparation

 Language similar to AHAM HRF-1-2008 section 1, with the following 

differences

 Use of concepts expressed in EPCA, for example 

“representative average consumer use”

 Explicit acknowledgement that test conditions may not 

themselves be representative of average consumer use.

 General description of controls or features that would provide 

non-representative measurements rather than specific 

examples--to broaden the coverage.

 Explicit requirement for petition for waiver in case 

measurements are non-representative
2222Building Technologies Program | Program Name or Ancillary Text eere.energy.gov

Proposed Modified Language (Appendices A1, B1, A, B):

Product Set Up

Test Sample Preparation

2.6 The cabinet and its refrigerating mechanism shall be assembled and set up 

in accordance with the printed consumer instructions supplied with the 

cabinet. Set-up of the refrigerator or refrigerator-freezer shall not deviate from 

these instructions, unless explicitly required or allowed by this test procedure. 

Specific required or allowed deviations from such set-up include the following:

(a) Connection of water lines and installation of water filters are not required;

(b) Clearance requirements from surfaces of the product shall be as described 

in section 2.8 below;

(c) The electric power supply shall be as described in HRF-1-2008 

(incorporated by reference; see § 430.3), section 5.5.1;

(d) Temperature control settings for testing shall be as described in section 3 

below. Settings for convertible compartments and other temperaturecontrollable or special compartments shall be as described in section 2.7 below; 

and

(e) The product does not need to be anchored or otherwise secured to prevent 

tipping during energy testing.

For cases in which set-up is not clearly defined by this test procedure, 

manufacturers must submit a petition for a waiver (see section 7).
2323Building Technologies Program | Program Name or Ancillary Text eere.energy.gov

Request for Comment on Test Sample Preparation and Test 

Procedure Waivers

Issue 4: Test Sample Preparation

DOE invites comments on the proposed clarifications of test 

procedures for preparing test samples. DOE has proposed allowed 

and required deviations from set-up according to installation 

instructions and invites comments on whether additional such 

deviations should be incorporated into the test procedure.

Test Sample Preparation

Issue 5: Test Procedure Waivers 

DOE seeks comment on the proposed language requiring petition for 

waivers to address products equipped with controls or other features 

that modify the operation of energy using components during the 

energy test. DOE seeks comment on whether more specific 

definitions could or should be provided to define either the product 

characteristics that would make the test procedure unsuitable for use 

or to define representative average use.
2424Building Technologies Program | Program Name or Ancillary Text eere.energy.gov

 AHAM HRF-1-1979 section 7.4.2 requires that clearance from the 

rear wall of a product under test be 

 “ . . . in accordance with the manufacturer’s instructions or as 

determined by mechanical stops on the back of the cabinet.”

 Recent versions of AHAM HRF-1 all specify that the clearance be

 “ . . . the minimum distance in accordance with the manufacturer's 

instructions or as determined by mechanical stops on the back of the 

cabinet.”

 DOE proposes to adopt a modification of the updated requirement 

which provides further clarification of:

 Flatness and orientation of wall facing rear of unit.

 Leveling of product and orientation with respect to the rear wall.

 Minimum size of a simulated rear wall, and a requirement that it be 

solid.

Product Clearances to Walls

DOE proposes to update the requirement for clearance from the rear of 

the product.
2525Building Technologies Program | Program Name or Ancillary Text eere.energy.gov

Request for Comment on Product Clearances to Walls

Issue 16: Wall Clearance

DOE invites comment on the proposed procedures regarding 

clearance between the rear of a tested cabinet and the test chamber 

or simulated wall. If the proposal requires modification, what 

changes are needed and why?

Product Clearances to Walls
2626Building Technologies Program | Program Name or Ancillary Text eere.energy.gov

• Standard Temperature sensor locations are illustrated in AHAM 

HRF-1.

• AHAM HRF-1 1979 Figures 7-1 and 7-2

• AHAM HRF-1 2008 Figures 5-1 and 5-2

• Current reporting requirements for alternative locations in 

Appendix A1, section 5.1: 

• If the interior arrangements of the cabinet do not conform with those 

shown in Figures 7.1 and 7.2 of HRF–1–1979, measurements shall 

be taken at selected locations chosen to represent approximately the 

entire refrigerated compartment. The locations selected shall be a 

matter of record. 

• DOE proposes the following changes and clarifications:

• Clarification of “shall be a matter of record”.

• Require manufacturers to petition for waiver in case of significant 

deviations from standard sensor placements.

• Specification that deviations greater than 2 inches are considered 

significant.

Alternative Temperature Sensor Locations

DOE proposes to clarify the requirement for reporting of alternative 

temperature sensor locations.
2727Building Technologies Program | Program Name or Ancillary Text eere.energy.gov

Request for Comment on Alternative Temperature

Sensor Locations

Issue 6: Temperature Sensor Locations

DOE seeks comment regarding frequency of testing using 

temperature sensor locations not specifically shown in Figures 7.1 

and 7.2 of HRF-1-1979. DOE also seeks comment on whether the 

proposed exception to proposed requirements for waivers 

associated with non-standard sensor location arrangements are 

reasonable for limiting the frequency of such waivers.

Alternative Temperature Sensor Locations
2828Building Technologies Program | Program Name or Ancillary Text eere.energy.gov

• Would primarily apply to Appendix A1 section 3.2.1 for 

selection of thermostat settings. The current language:

“A first test shall be performed with all compartment temperature controls set at 

their median position midway between their warmest and coldest settings. Knob 

detents shall be mechanically defeated if necessary to attain a median setting. A 

second test shall be performed with all controls set at either their warmest or their 

coldest setting (not electrically or mechanically bypassed), whichever is 

appropriate, to attempt to achieve compartment temperatures measured during the 

two tests which bound (i.e., one is above and one is below) the standardized 

temperature for the type of product being tested. . . .”

• Key issue: Approach for defeat of controls to achieve 

median settings is generally not possible with electronic 

control products.

Test Control Settings

DOE proposes modifications to update procedures for temperature 

settings for electronic-control products.
2929Building Technologies Program | Program Name or Ancillary Text eere.energy.gov

• Electronic controls often do not allow setting temperature 

exactly at the median position. Example:

– Fresh Food compartment, settings every  ̊F from 33 to 46.

– Median is 39.5  ̊F, not possible with the control system.

• Proposed resolution:

– Use nearest setting to the average of the highest and lowest that 

can be selected.

– If two selectable settings are the same difference from this 

average, use the warmer setting.

Test Control Settings

Achieving Median Temperature Settings.
3030Building Technologies Program | Program Name or Ancillary Text eere.energy.gov

Request for Comment on Test Control Settings

Issue A1: Median Setting for Electronic Control Products

DOE requests comment on the proposed language for addressing the 

potential inability of some electronic control products to be set in the 

median position and requests details regarding alternatives if the 

proposed language is not appropriate.

Test Control Settings
3131Building Technologies Program | Program Name or Ancillary Text eere.energy.gov

Differing treatment of convertible and non-convertible special 

compartments.

Convertible and Special-Purpose Compartments

• AHAM HRF-1 has conflicting requirements for convertible and nonconvertible compartments. From HRF-1-2008, section 5.5.2:

• g) Compartments which are convertible (e.g. from refrigerator to 

freezer) are operated in the highest energy usage position.

• h) Other temperature controllable compartments (such as crispers 

convertible to meat keepers) shall be considered special 

compartments and shall be tested with controls set to provide the 

coldest temperature.

• DOE proposes adding specific language to both Appendices A1 and 

A requiring use of the highest-energy position.

• Reinforcement of requirement for convertible compartments.

• Achieve consistency of treatment for convertible and non-convertible 

compartments.
3232Building Technologies Program | Program Name or Ancillary Text eere.energy.gov

Request for Comment on Convertible and Special 

Compartments

Issue 7: Convertible Temperature and Special Compartments

DOE invites comment on the proposed clarifications of test 

procedures for treatment of convertible-temperature compartments 

and the proposed amendments to the test procedures for special 

compartments. DOE also requests comment on whether a size limit 

should be established for classification of a special compartment, 

and what a reasonable size limit might be.

Convertible and Special-Purpose Compartments
3333Building Technologies Program | Program Name or Ancillary Text eere.energy.gov

• Refrigerator-freezer definition allows for “ . . . two or more 

compartments . . .”

• But . . . .the test procedure energy use calculation (10 CFR 

430 subpart B appendix A1 section 6.2.2.2) references TR and 

TF as if there is only one of each type of compartment. 

• AHAM HRF-1 provides requirements for convertible and 

special compartments—DOE proposes adjustment of these 

requirements as just described.

• Questions, issues:

– Differing compartment configurations: totally separate 

compartments, sub-compartments, convertible compartments.

– Incorporating a compartment’s temperature into the overall 

compartment temperature vs. the highest energy use setting?

– How to incorporate a compartment’s temperature into the 

overall compartment temperature calculation?

Inadequacy of the two-compartment temperature setting approach

Auxiliary Compartments
3434Building Technologies Program | Program Name or Ancillary Text eere.energy.gov

• Add definition for “separate auxiliary compartments” to clarify what 

type of compartments are addressed by these test procedure 

modifications:

– Freezer or fresh food compartments in addition to the “first” freezer or 

fresh food compartment.

– Separate door to the outside.

• Temperature sensor placement as indicated, for example, in 

AHAM HRF-1-1979, Figures 7.1 and 7.2

• In case of separate temperature settings, use of same 

median, warm, and cold settings as specified for 

temperature settings of all other compartments.

• Volume-weighted temperature averaging of all applicable 

compartments to determine freezer or fresh food 

temperature for comparison with standardized 

temperatures.

DOE proposes the following test procedure modifications.

Auxiliary Compartments
3535Building Technologies Program | Program Name or Ancillary Text eere.energy.gov

Request for Comment on Auxiliary Compartments

Issue 8: Auxiliary Compartments

DOE invites comment on the proposed approach to modification of 

the test procedures to address auxiliary compartments with external 

doors.

Auxiliary Compartments
3636Building Technologies Program | Program Name or Ancillary Text eere.energy.gov

• Current definition (Appendix A1, section 1.3):

‘‘Anti-sweat heater’’ means a device incorporated into the design 

of a refrigerator or refrigerator-freezer to prevent the accumulation 

of moisture on exterior surfaces of the cabinet under conditions of 

high ambient humidity.

• Some newer products use anti-sweat heaters to control 

sweating inside the product.

– Fresh food walls near ducts serving the ice compartment in 

French Door refrigerator-freezers with TTD ice service.

• Proposed definition (Appendices A1, B1, A, B):

“Anti-sweat heater” means a device incorporated into the design 

of a refrigerator or refrigerator-freezer to prevent the accumulation 

of moisture on the exterior or interior surfaces of the cabinet.

DOE proposes to expand the anti-sweat heater definition to include 

heaters controlling interior sweating.

Anti-Sweat Heater Definition
3737Building Technologies Program | Program Name or Ancillary Text eere.energy.gov

Request for Comment on Anti-Sweat Heater Definition

Issue 9: Anti-Sweat Heater Definition

DOE invites comment on the proposal to allow the anti-sweat heater 

definition to include condensation of moisture on all rather than just 

exterior cabinet surfaces. DOE also seeks comment regarding 

whether additional clarity beyond the proposed amendments is 

required and, if so, what specific clarification would be needed.

Anti-Sweat Heater Definition
3838Building Technologies Program | Program Name or Ancillary Text eere.energy.gov

• In 10 CFR 430 section 23(a), sections (2) and (5) are in 

conflict regarding the anti-sweat heater switch.

• Section (2), annual operating cost for refrigerators and 

refrigerator-freezers with an anti-sweat heater switch, allows 

averaging of energy use for the standard cycle and a cycle 

with the switch in its position just before the unit is shipped.

• The standard cycle is a cycle “in which the anti-sweat 

heater control, when provided, is set in the highest energy 

consuming position.” (Appendix A1, section 1.7)

• Section (5), annual energy use, is based on energy use for 

the standard cycle only.

• The same conflict is present in section 23(b) for freezers.

Testing with the Anti-Sweat Heater Switch Turned Off

Anti-Sweat Heater Switch
3939Building Technologies Program | Program Name or Ancillary Text eere.energy.gov

• The determination of annual energy use for 

refrigerators, refrigerator-freezers, and freezers was 

added to the test procedures on February 7, 1989 (54 

FR 6062).

• That notice did not discuss the different approach for 

the calculation of energy use as opposed to operating 

cost.

• Most manufacturers use averaging of tests with the 

switch on and off for both energy use and operating 

cost.

DOE proposes to change the language to call for averaging of tests 

for both energy use and operating cost.

Anti-Sweat Heater Switch
4040Building Technologies Program | Program Name or Ancillary Text eere.energy.gov

• French Door products often require electric anti-sweat heating 

(ASH).

• Electronic control systems can automatically control heaters 

based on sensor input so they are used only as needed to avoid 

sweating.

• The General Electric Company initially petitioned for a waiver to 

measure energy use of a variable ASH system.

– Waiver granted February 27, 2008. 73 FR 10425

– ASH energy use contribution is calculated, added to energy measured in 

regular test with the ASH turned off.

– Manufacturer specification of watts vs. relative humidity curve.

– Averaging of ASH energy is based on a national average frequency 

distribution of indoor relative humidity developed from weather data.

– System factor of 1.3 for thermal load contribution and control power.

– Annual average duty cycle ≤5% (depends on watts vs. RH curve).

• DOE has granted similar waivers and interim waivers to Whirlpool, 

Electrolux, Samsung, and Haier.

DOE has granted test procedure waivers for variable anti-sweat heating.

Variable Anti-Sweat Heating
4141Building Technologies Program | Program Name or Ancillary Text eere.energy.gov

• Measurement of the control system’s ability to reduce anti- sweat heater wattage in lower humidity conditions.

• Energy use contribution of ASH in moist conditions is added 

to the energy measured in a regular test in dry conditions in 

which the ASH would not operate. 

• Testing in a 72  ̊F ambient on a limited number of humidity 

conditions to prevent excessive test burden: 95%, 65%, 

and 35%.

• Develop curve for ASH energy use adder vs. RH based on ASH 

energy use adder at 95% and 65% RH. 

• Test approach assumes that ASH wattage varies linearly with 

ambient dew point.

• Weighting of energy use at each humidity condition using the 

weighting factors of the GE waiver.

• No system adjustment needed, since this is already 

captured by the measurement.

DOE proposes an approach that is more amenable to independent 

verification of performance.

Variable Anti-Sweat Heating
4242Building Technologies Program | Program Name or Ancillary Text eere.energy.gov

• Standard ambient and interior 

temperatures and typical thermal 

resistances.

• Solving for wattage that keeps 

surface temperature a fixed 

difference above dew point gives 

a linear wattage/dew point 

relationship.

DOE analysis supports a linear control assumption

Variable Anti-Sweat Heating

Thermal 

Resistance 2

Thermal 

Resistance 1

ASH Heat Input

Increasing Thermal 

Resistance 2
4343Building Technologies Program | Program Name or Ancillary Text eere.energy.gov

• Ambient conditions.

• 72 +/- 1  ̊F; 95% +/- 2% RH

• 72 +/- 1  ̊F; 65% +/- 2% RH

• 72 +/- 1  ̊F; 25% +/- 10% RH (wide range since control will turn the 

ASH off)

• Compartment temperatures. 

• 5  ̊F freezer, 38 +/- 2 ̊F fresh food (same as current variable defrost 

Part 3 test, with expected change to 0  ̊F / 39  ̊F in appendix A)

• Test period the same as for a test with a unit having no 

automatic defrost (Appendix A1, section 4.1.1)

• Calculation of the energy use adder for RH other than 65% 

and 95% is based on interpolation based on dew points:

• DERH = DE65 + (DE95 – DE65) × (DPRH – DP65)/(DP95 – DP65), where 

DE represents the energy use adders, DP the dew points, and RH, 

65, and 95 the relative humidities. 

• Eliminate anti-sweat heater switch allowance if using the 

variable anti-sweat heating procedure.

Proposed Test Details.

Variable Anti-Sweat Heating
4444Building Technologies Program | Program Name or Ancillary Text eere.energy.gov

• Use 90  ̊F ambient?

– Not representative of anti-sweat operating conditions.

• No test?

– Little or no opportunity for independent verification of 

performance.

• Relax requirement for chamber humidity control in the test?

– Impossible to verify that control responds to ambient humidity, the 

key control parameter for variable anti-sweat heating.

• Allow results for one product to be used in energy 

calculations for certification testing of product with the 

“same” VASH system?

– DOE will consider this approach.

DOE Considered Variations on this approach to mitigate test burden.

Variable Anti-Sweat Heating
4545Building Technologies Program | Program Name or Ancillary Text eere.energy.gov

Request for Comment on Variable Anti-Sweat Heating

Issue 11: Test for Energy Use Contribution of Variable Anti-Sweat 

Heater Control

(a) DOE invites comment on the proposal to incorporate into the test 

procedures a determination of the energy use associated with 

variable anti-sweat heater controls involving test measurements. 

(b) DOE also invites comment on whether the variable anti-sweat 

heater test procedure should also be incorporated into Appendices B 

and B1 for freezers. 

(c) Finally, DOE invites comment on the suggested approach for 

reduction of test burden associated with the proposed test; DOE 

requests information and data providing justification for adopting 

this approach. DOE further requests comments providing 

recommendations for alternative approaches for reduction of test 

burden and data supporting such alternative approaches.

Variable Anti-Sweat Heating
4646Building Technologies Program | Program Name or Ancillary Text eere.energy.gov

• Precooling reduces freezer temperature prior to a defrost.

• The defrost part of the long time defrost test starts (1) when the 

last compressor cycle ends OR (2) when the defrost heater is 

energized. 

Modifying the Procedure to Capture Precooling Energy 

Long Time Defrost Test Method
4747Building Technologies Program | Program Name or Ancillary Text eere.energy.gov

Long Time Defrost Test Method

• Added pre-cooling energy use is not measured by the procedure

• Pre-cooling represents about 2% of total energy for this example.
4848Building Technologies Program | Program Name or Ancillary Text eere.energy.gov

• Shift the start of the defrost part of the test to the last compressor 

“off” at the end of a period of steady-state cycling operation before 

initiation of defrost.

• Modification would apply to existing Appendices A1 and B1 and to 

new Appendices A and B, 

DOE proposes to modify the test procedure to include all energy use 

associated with defrost 

Long Time Defrost Test Method
4949Building Technologies Program | Program Name or Ancillary Text eere.energy.gov REGULAR COMPRESSOR CYCLE PRECOOL CYCLE DEFROST HEATER REGULAR COMPRESSOR CYCLE

T2

4 HOURS MAXIMUM

START END

ENERGY

Long Time Defrost Test Method

Diagram of Proposed Revision to Test Cycle
5050Building Technologies Program | Program Name or Ancillary Text eere.energy.gov

• Change in measured energy use?

– Not for most refrigerator-freezer products!

– Intent has always been for measurement of all energy associated 

with defrost (consider the normal automatic defrost test procedure, 

Appendix A1, section 4.1.2).

– DOE concludes that adjustment of the energy conservation standard 

is not necessary.

• Suitability for a variable-speed compressor system that 

doesn’t cycle off?

– Start at a time when the compartment temperatures are within their 

ranges measured during steady state operation.

– Or within 0.5  ̊F of the average compartment temperatures measured 

during steady state operation if the temperature ranges are 1  ̊F or 

less.

• Other defrost energy issues:

– Multiple evaporator defrosts? Next NOPR section.

– Partial Recovery? 

– Proper selection of start/stop times?

– Validity of 50% run assumption?

Issues

Long Time Defrost Test Method
5151Building Technologies Program | Program Name or Ancillary Text eere.energy.gov

Illustration of Multiple evaporator defrosts, partial recovery.

Long Time Defrost Test Method

FF Evaporator

Partial Recovery Defrost
5252Building Technologies Program | Program Name or Ancillary Text eere.energy.gov

• Partial Recovery hides about 0.5% of the energy for 

the previous example.

• Possible test procedure modifications to capture all of 

the energy use:

– Extend defrost part of test to the third compressor “on” after 

defrost.

– Provide a temperature recovery specification.

– Include temperature averaging for the defrost period.

Long Time Defrost Test Method

Partial recovery
5353Building Technologies Program | Program Name or Ancillary Text eere.energy.gov

Long Time Defrost Test Method

 FF evaporator defrost contribution for the previous example:

• Negative (-18 watt-hours per defrost) using the current procedure.

• +26 watt-hours per defrost when test period ends at end of 2nd

compressor cycle after defrost. 

• Actual defrost heat input is 26 watt-hours (110 watts for 14 minutes)

 The total energy use measurement would be ~3% higher if defrost 

part of test ends at the end of second compressor cycle after defrost.

 This energy use is closer to the result obtained when using the 

conventional auto-defrost approach of measuring from an event 

during one defrost cycle to the same event in the next defrost cycle.

Start/end times for defrost part of test

Full-cycle measurement 1.86 kWh/day

Two-part measurement: Current Method 1.78 kWh/day

End at 2nd compressor cycle OFF 1.83 kWh/day

End at 3rd compressor cycle ON 1.79 kWh/day

End at 3rd compressor cycle OFF 1.83 kWh/day
5454Building Technologies Program | Program Name or Ancillary Text eere.energy.gov

Long Time Defrost Test Method

 The defrost energy is weighted in test procedure assuming 50% run:

• ET = (1440 × EP1/T1) + (EP2 - (EP1 × T2/T1)) × (12/CT)

12 represents 24 hours times 50% compressor run

CT is equal to the  ̋average ̋ compressor run between defrosts

 For variable-speed compressor systems, the required number of 

compressor operating hours between defrosts should be longer, thus 

the control algorithm’s CT value will be higher.

 Hence, the 12/CT weighting factor for defrost energy will underrepresent defrost energy use for products with variable speed 

compressors.

Validity of 50% compressor run assumption
5555Building Technologies Program | Program Name or Ancillary Text eere.energy.gov

Request for Comment on Long Time Defrost Test Method

Issue 14: Precooling and Other Issues Associated with the Long 

Time Defrost Test Method

DOE invites comment on the proposal to include precooling energy 

in the procedures for testing products with long-time or variable 

defrost controls. 

DOE also invites comment regarding whether additional test 

procedure amendments are appropriate in order to address possible 

use of partial recovery to reduce energy use of this part of the test, or 

on any of the other issues raised.

Long Time Defrost Test Method
5656Building Technologies Program | Program Name or Ancillary Text eere.energy.gov

• Current test procedure is written as if all defrost cycles are the 

same.

• Where this is not the case, the proposed test procedure language 

will require proper accounting for the energy use of all defrost 

cycle types.

• Proposed definition of “defrost cycle type”:

“. . . a distinct sequence of control whose function is to remove 

frost and/or ice from a refrigerated surface. There may be 

variations in the sequence of control for defrost such as the 

number of defrost heaters energized. Each such variation 

establishes a separate distinct defrost cycle type.”

• Summation of defrost contribution of all defrost cycle types:

Multiple Defrost Cycle Types

DOE proposes language to incorporate measurement of more 

than one type of defrost cycle
5757Building Technologies Program | Program Name or Ancillary Text eere.energy.gov

Request for Comment on Multiple Defrost Cycle Types

Issue 15: Multiple Defrost Cycle Types

DOE requests comments on the proposed amendments addressing 

test procedures for products with long-time or variable defrost that 

incorporate multiple types of defrost cycles.

Multiple Defrost cycle Types
5858Building Technologies Program | Program Name or Ancillary Text eere.energy.gov

• DOE is not aware that any manufacturers use this part 

of the test to certify products.

• DOE testing of a single product shows that the test 

makes a small difference in measured energy use.

– CT based on Part 3 test: 21 hours.

– CT based on CTL and CTM: 24 hours.

– Difference in total energy use: less than 0.4%

• Significant test burden: Test duration of 1 to 2 weeks.

Variable Defrost Optional Test Part 3

DOE proposes to eliminate the optional third part of the test for 

variable defrost products
5959Building Technologies Program | Program Name or Ancillary Text eere.energy.gov

Request for Comment on Elimination of Part 3

of the Variable Defrost Test

Issue 10: Elimination of the Optional Third Part of the Test for 

Refrigerator-Freezers with Variable Defrost

DOE invites comment on the proposed elimination of the optional 

third part of the test for testing refrigerator-freezers with variable 

defrost. In particular, DOE requests information indicating if the third 

part of the procedure has been used in recent years for rating a 

product, and whether it provides a more accurate indication of the 

frequency of defrosts for such products than the default equation for 

this parameter.

Variable Defrost Optional Test Part 3
6060Building Technologies Program | Program Name or Ancillary Text eere.energy.gov

• Simplification of the Energy Use Equation for Products 

with Variable Defrost Control.

• Energy Testing and Energy Use Equation for Products 

with Dual Automatic Defrost. 

Corrections and Other Test Procedure Language Changes

This NOPR section addresses two items:

Corrections and Improvements
6161Building Technologies Program | Program Name or Ancillary Text eere.energy.gov

• The equation for CT is missing a parenthesis.

CT=(CTL×CTM)/(F×(CTM−CTL)+CTL)

• Units of CTL, and CTM are specified incorrectly as “in tenths of an 

hour”. DOE proposes “in hours rounded to the nearest tenth of an 

hour”

• The section currently provides equations for F, ETL, and ETM that 

are unnecessary and confusing. 

• Next slide explains proposed change

Proposed modifications to variable defrost control energy 

consumption equation in appendix A1 section 5.2.1.3

Corrections and Improvements
6262Building Technologies Program | Program Name or Ancillary Text eere.energy.gov

• DOE proposes to remove the text highlighted in red.

• F=ratio of per day energy consumption in excess of the least energy 

and the maximum difference in per day energy consumption and is 

equal to

F = (1/CT − 1/CTM)/(1/CTL − 1/CTM)= (ET − ETL)/ETM − ETL) or 0.20 

in lieu of testing to find CT.

ETL = least electrical energy used (kilowatt hours)

ETM=maximum electrical energy used (kilowatt hours).

• These changes , and the change to the CT equation, would be for 

Appendices A1 and A, and for Appendices B1 and B.

Corrections and Improvements

Proposed change to equations for F, ETL, and ETM
6363Building Technologies Program | Program Name or Ancillary Text eere.energy.gov

• The definitions of EPF, EP2F, EPR, and EP2R are incorrect.

• ET=(1440 × EP1/T1) + (EP2F − (EPF × T2/T1))

× 12/CTF + (EP2R − (EPR × T3/T1)) × 12/CTR

• EPF = energy expended in kilowatt-hours during the second part of the 

test for the freezer system by the freezer system. (should be first part)

• EP2F = total energy expended during the second part of the test for the 

freezer system. (should be the energy just of the freezer system) 

• EPR = energy expended in kilowatt-hours during the second part of the 

test for the refrigerator system by the refrigerator system. (should be first 

part) 

• EP2R = total energy expended during the second part of the test for the 

refrigerator system. (should be the energy just of the refrigerator system) 

• DOE proposes to correct these parameter definitions (Appendices 

A1 and A).

Proposed modifications to dual defrost control energy 

consumption, Appendix A1 section 5.2.1.5. 

Corrections and Improvements
6464Building Technologies Program | Program Name or Ancillary Text eere.energy.gov

• Provision of basic test information to allow accurate third party 

testing.

• Variable Defrost: Indication of whether the product has this 

control feature, and the values of CTL and CTM used to calculate 

energy use.

• Variable Anti-Sweat Heater Control: Indication of whether the 

product has this control feature.

• Testing with Non-standard temperature sensor locations:

Indication that non-standard temperature sensor locations have 

been used.

– Test reports filed by the manufacturer and available for review will provide 

details regarding adjustments of sensor locations.

• Proposed changes to be implemented in 10 CFR 430.62(a)(4)(xii).

DOE proposes requiring inclusion of basic energy test 

information in certification report information

Certification Report Information
6565Building Technologies Program | Program Name or Ancillary Text eere.energy.gov

Request for Comment on Proposed Requirement for 

Information Included in Certification Report

Issue 23: Certification Report Amendments

DOE requests comments on the proposed additions to certification 

reports that will clarify the approach used to test the product.

Would this proposal be sufficient to enable accurate testing to be 

performed, and, if this information is not sufficient, what additional or 

alternative information should be provided?

Certification Report Information
6666Building Technologies Program | Program Name or Ancillary Text eere.energy.gov

Request for Comment on Measured Energy Impacts for 

Proposed Test Procedure Amendments

Issue 2: Measured Energy Impacts of Amendments Proposed to be 

required for testing prior to the Compliance Date of the New Energy 

Conservation Standards

DOE invites comment on whether any of the amendments proposed 

to be required for testing prior to the compliance date of the new 

energy conservations standards (scheduled per EPCA to be January 

1, 2014), would be likely to alter measured energy use, and if so, how. 

DOE requests information quantifying these impacts, if any.

Measured Energy Impacts
6767Building Technologies Program | Program Name or Ancillary Text eere.energy.gov

Test Procedure Overview

A. Products Covered by the Test Procedure Changes

B. Combination Wine Storage-Freezer Products 

C. Establishing New Appendices A and B, and Compliance Date for the Amended Test 

Procedure

D. Amendments Required for Testing Prior to New Energy Standard Compliance Date

E. Amendments Required for Testing on/after New Energy Standard Compliance Date

F. Other Issues Under Consideration

G. Compliance with Other EPCA Requirements
6868Building Technologies Program | Program Name or Ancillary Text eere.energy.gov

Amendments Required for Testing on/after New Energy 

Standard Compliance Date:

1. Incorporating by Reference AHAM Standard HRF-1-2008 for Measuring Energy and Internal 

Volume of Refrigerating Appliances

2. Establishing New Compartment Temperatures

3. Establishing New Volume Calculation Method

4. Control Settings for Refrigerators and Refrigerator-Freezers During Testing

5. Icemakers and Icemaking
6969Building Technologies Program | Program Name or Ancillary Text eere.energy.gov

• DOE proposes adoption of some provisions of AHAM 

HRF-1-2008 for products tested for compliance with the 

future energy conservation standards. 

– New compartment temperatures

– New volume adjustment factors

– New volume calculation methods

• Modified Appendices A1 and B1 would continue to refer to 

AHAM HRF-1-1979.

• New Appendices A and B would refer to AHAM HRF-1-

2008

Incorporating by Reference AHAM Standard HRF-1 2008

Incorporating AHAM Standard HRF-1-2008
7070Building Technologies Program | Program Name or Ancillary Text eere.energy.gov

Request for Comment on Incorporating 

AHAM Standard HRF-1-2008

Issue 3: Incorporating by Reference AHAM Standard HRF-1-2008

DOE invites comment on the approach proposed for incorporating 

provisions of AHAM Standard HRF-1-2008, including (a) maintaining 

the reference to AHAM Standard HRF-1-1979 in Appendices A1 and 

B1, which will continue to be in effect until the new energy 

conservation standards become mandatory; (b) incorporating 

directly into Appendices A1 and B1 language from AHAM Standard 

HRF-1-2008 to clarify test procedures; and (c) changing all references 

to HRF-1-2008 for Appendices A and B, which will become mandatory 

for verifying compliance with energy standards on and after the 

compliance date for the new energy conservation standards in 2014.

Incorporating AHAM Standard HRF-1-2008
7171Building Technologies Program | Program Name or Ancillary Text eere.energy.gov

• IEC Technical Committee 59, Working Group 12 is developing IEC 

Standard 62552, with different compartment temperatures than 

currently used in the DOE test procedure.

• AHAM HRF-1-2008 has adopted the proposed IEC temperatures.

DOE proposes to adopt new compartment temperatures to 

enhance international harmonization.

New Compartment Temperatures

Product Compartment Current Proposed

Refrigerator- Freezer

Freezer

5 ̊F 0 ̊F

Fresh Food 45 ̊F 39 ̊F

Freezer Refrigerator 15 ̊F No change

Fresh Food 45 ̊F 39 ̊F

All-Refrigerator Fresh Food 38 ̊F 39 ̊F

Freezer Freezer 0 ̊F No change
7272Building Technologies Program | Program Name or Ancillary Text eere.energy.gov

• International harmonization.

• Better consistency with typical settings in the field.

• Reduce the potential impact of circumvention associated with the 

Warm/Warm setting when testing refrigerator-freezers.

Benefits

New Compartment Temperatures

Issues

• Volume adjustment factor changes.

• Basic Refrigerators: 1.44 → 1.47

• Refrigerator-Freezers: 1.63 → 1.76

• Freezers: 1.73 → 1.76

• Measured energy will change, requiring adjustment of the energy 

conservation standard.

• Product classes that are a mix of all-refrigerators and other 

refrigerators or refrigerator-freezers need to be split.
7373Building Technologies Program | Program Name or Ancillary Text eere.energy.gov

• New Appendices A and B based on AHAM HRF-1-2008 and the 

new compartment temperatures.

• Freezers are affected by the change in volume adjustment factor!

• Future energy conservation standards to be based on Appendices 

A and B (EISA-mandated compliance date for new products 

January 1, 2014)

• Appendices A1 and B1, based on AHAM HRF-1-1979, still 

applicable for measurement of energy use prior to the future 

energy conservation standards compliance date.

DOE proposes to adopt the new compartment 

temperatures in the new Appendices A and B.

New Compartment Temperatures
7474Building Technologies Program | Program Name or Ancillary Text eere.energy.gov

Request for Comment on New Compartment Temperatures

Issue 12: New Compartment Temperatures

DOE invites comment on the establishment of new compartment 

temperatures for testing of refrigerators and refrigerator-freezers and 

the new volume adjustment factors for testing of refrigeration 

products.

New Compartment Temperatures
7575Building Technologies Program | Program Name or Ancillary Text eere.energy.gov

• Simplified method with less room for variation in interpretation.

• Small overall volume impact.

• Requires recasting of the energy conservation standard, which is 

expressed in terms of adjusted volume.

• DOE proposes incorporating this change in Appendices A and B.

• The existing volume calculation method will still apply to Appendices 

A1 and B1, applicable for products prior to the future energy 

conservation standards compliance date.

DOE also proposes adopting the new volume calculation 

method of AHAM HRF-1-2008

New Volume Calculation Method
7676Building Technologies Program | Program Name or Ancillary Text eere.energy.gov

• AHAM HRF-1-2008, section 4 does not specifically 

mention whether the ice maker or ice storage bin are 

to be considered part of the volume.

• DOE proposes adding language to Appendix A, section 

5 to ensure that these components are treated as not 

being in place for the volume calculation (consistent 

with AHAM HRF-1-1979)

Adjustments to the new volume calculation method 

language.

New Volume Calculation Method
7777Building Technologies Program | Program Name or Ancillary Text eere.energy.gov

Request for Comment on New Volume Calculation Method

Issue 13: New Volume Calculation Method

DOE invites comment on the establishment of a new volume 

calculation method. DOE also invites comment on the proposed 

clarification of the HRF-1-2008 volume calculation method 

addressing treatment of automatic icemakers and ice storage bins in 

the volume calculation method. Finally, DOE requests comment on 

whether this clarification should be applied also to freezers.

New Volume Calculation Method
7878Building Technologies Program | Program Name or Ancillary Text eere.energy.gov

• Issues:

– Current test procedure specifies standardized temperature only 

for the freezer compartment of refrigerators and refrigeratorfreezers.

– Settings for second test based only on freezer compartment 

temperature during first test.

– The current procedure could permit energy use reporting and 

certification for products that fail to hold standardized 

temperatures.

– Test settings for the second test are not specified for some 

possible first-test outcomes.

DOE proposes to clarify the procedure for temperature 

control settings.

Temperature Control Settings
7979Building Technologies Program | Program Name or Ancillary Text eere.energy.gov

• Proposals:

– Establish dual standardized temperatures for basic refrigerators 

and refrigerator-freezers (39  ̊F fresh food compartment 

temperature)

– Use of Warm/Warm in second test only if both compartments are 

cooler than the standardized temperatures in the first test.

– Clarify further testing and energy use calculation for situations not 

defined in current test procedure.

– Provide Tables in the test procedure to clarify the temperature 

setting procedures.

DOE proposes test procedure additions to clarify the 

procedure for temperature control settings.

Temperature Control Settings
8080Building Technologies Program | Program Name or Ancillary Text eere.energy.gov

Temperature Control Settings

First Test Second Test Third Test

Settings

Energy Calculation Based on: Case 

Settings Results Settings Results Number

Fzr Mid

FF Mid

Fzr Low

FF Low

Fzr Warm

FF Warm

Fzr Low

FF Low

None Second Test Only 1

Fzr Low

FF High

None Propose use of First and Second 

Test

2

Fzr High

FF Low

None First and Second Test 3

Fzr High

FF High

None First and Second Test 4

Fzr Low

FF High

Fzr Cold

FF Cold

Fzr Low

FF High

None Propose Third test (W/W), use of 

Second and Third Tests

5

Fzr Low

FF Low

None Propose use of First and Second 

Tests

6

Fzr High

FF Low

Fzr Cold

FF Cold

Fzr High

FF Low

Fzr Warm

FF Warm

Second and Third Tests 7

Fzr Low

FF Low

None First and Second Tests 8

Fzr High

FF High

Fzr Cold

FF Cold

Fzr Low

FF Low

None First and Second Tests 9

Fzr Low

FF High

None First and Second Tests 10

Fzr High

FF Low

Fzr Warm

FF Warm

Second and Third Tests 11

Fzr High

FF High

Fzr Warm

FF Warm

Second and Third Tests 12
8181Building Technologies Program | Program Name or Ancillary Text eere.energy.gov

Request for Comment on Temperature Control Settings 

During Testing

Issue 20: Temperature Settings

DOE requests comment on proposed modifications to the test 

procedures to clarify requirements for temperature settings, 

including whether DOE’s understanding regarding the approach used 

by manufacturers is correct, and comment on whether these 

requirements should be incorporated into Appendices A1 and B1 as 

well as Appendices A and B. DOE also requests comment on whether 

rating of products should be disallowed in case of tests in which 

compartment temperatures are higher than their standardized 

temperatures with temperature controls in their coldest position, and 

whether such an amendment should be introduced immediately in 

Appendices A1 and B1, or whether they should be considered only 

for Appendices A and B.

Temperature Control Settings
8282Building Technologies Program | Program Name or Ancillary Text eere.energy.gov

• DOE has provided guidance regarding treatment of 

icemakers during energy testing with documents made 

public in January and December, 2009. 

• This section discusses incorporation of icemaking 

energy use into the energy use measurement.

• DOE also raises the question whether a test procedure 

amendment is needed to address presence of ice in 

the ice bin during testing.

Icemaking

Icemaker/Icemaking Topics
8383Building Technologies Program | Program Name or Ancillary Text eere.energy.gov

DOE proposes an interim approach for incorporation of 

icemaking energy use in the test measurement

Icemaking

• AHAM has been working on development of a test procedure for 

measurement of icemaking energy use.

• NIST has conducted testing to explore issues associated with 

measurement of icemaking energy.

• Available information shows that development of a robust procedure for 

measuring icemaking energy use is very challenging.

• DOE proposes to incorporate a placeholder icemaking energy use value 

into the energy use measurement for products with automatic icemakers.

• Fixed placeholder value of 0.23 kWh/day based on preliminary 

AHAM testing.

• Insufficient information is available to determine dependence on key 

product characteristics (product class, efficiency level, etc.)
8484Building Technologies Program | Program Name or Ancillary Text eere.energy.gov

• Icemaking test procedure objectives:

– Applicability for all types of automatic ice makers.

– Test data is provided demonstrating viability of the procedure.

– The test procedure includes an ice production rate in pounds per 

day or per year supported by adequate data.

– Consensus among industry representatives that the test burden is 

not excessive.

– Accuracy and Repeatability.

• A Supplementary NOPR would be published to propose 

such a test procedure for consideration by stakeholders.

Icemaking

DOE will consider adopting a more comprehensive icemaking

test procedure.
8585Building Technologies Program | Program Name or Ancillary Text eere.energy.gov

Request for Comments on Icemaking

Issue 18: Icemaking

DOE requests comments on the proposed approach for integrating 

icemaking energy use into the energy use metrics for refrigeration 

products. DOE requests recommendations for development of a test 

method for determination of icemaking energy use, including data to 

show the viability of recommended approaches. DOE requests 

comments on whether refrigerators with freezer compartments could 

include icemakers. Finally, DOE requests any updated data 

supporting determination of a representative daily ice production 

factor. 

Icemaking

Issue 19: Presence of Ice in the Ice Bin During Testing

DOE seeks comment on whether a requirement should be adopted in 

the test procedure specifying whether ice may be in the ice bin 

during energy testing.
8686Building Technologies Program | Program Name or Ancillary Text eere.energy.gov

Test Procedure Overview

A. Products Covered by the Test Procedure Changes

B. Combination Wine Storage-Freezer Products 

C. Establishing New Appendices A and B, and Compliance Date for the Amended Test 

Procedure

D. Amendments Required for Testing Prior to New Energy Standard Compliance Date

E. Amendments Required for Testing on/after New Energy Standard Compliance Date

F. Other Issues Under Consideration

G. Compliance with Other EPCA Requirements
8787Building Technologies Program | Program Name or Ancillary Text eere.energy.gov

Review of Established or Proposed Requirements for Electric Heaters

Electric Heaters

• This NOPR section introduces no new proposals for test procedure 

regulatory language.

• The requirements already established or proposed in other NOPR 

sections for electric heaters are highlighted in this section.

• Anti-sweat: Definition change for internal sweat, Correction of 

energy use calculation language, variable anti-sweat control.

• Defrost: Modification of long-time defrost procedure, test procedure 

language correction/improvement, multiple defrost cycles.

• Compartment temperature trimming: Addressed by requirements for 

compartment temperature setpoint adjustment.

• Related to icemakers: Mold (harvest), Fill-tube

• Heaters for external evaporation of liquid water (drain pan, dispenser 

recess): Addressed by requirements consistent with normal use.

• Others?
8888Building Technologies Program | Program Name or Ancillary Text eere.energy.gov

Request for Comment on Electric Heaters

Issue 21: Electric Heaters

DOE requests comment regarding electric heaters: what types exist 

that are not discussed in the NOPR in section III.F.1, how do they 

contribute to energy use in normal use and in the energy test, and is 

test procedure modification recommended to more accurately reflect 

their energy use impact?

Electric Heaters
8989Building Technologies Program | Program Name or Ancillary Text eere.energy.gov

DOE raises the issue of rounding off of energy test results.

Energy Use Round-Off

• The current test procedure does not specify how many significant 

digits after the decimal point are required for reporting of energy 

use.

• Better precision than reporting to the nearest kWh/year is probably 

not justified.

• Required energy measurement accuracy of +/-0.5%

• At ~500 kWh/year, the required accuracy is no better than +/-2.5 

kWh/year.

• The energy standard would require similar rounding for 

consistency.
9090Building Technologies Program | Program Name or Ancillary Text eere.energy.gov

Request for Comment on Energy Use Measurement Round-Off

Issue 22: Energy Measurement Round-Off

DOE requests comment on the achievable accuracy in measurement 

of refrigeration product energy use and the guidance under 

consideration to specify reporting of energy use to the nearest 

kilowatt-hour and on the need to provide a similar rounding for 

maximum allowable energy use under the energy conservation 

standard.

Energy Use Round-Off
9191Building Technologies Program | Program Name or Ancillary Text eere.energy.gov

Test Procedure Overview

A. Products Covered by the Test Procedure Changes

B. Combination Wine Storage-Freezer Products 

C. Establishing New Appendices A and B, and Compliance Date for the Amended Test 

Procedure

D. Amendments Required for Testing Prior to New Energy Standard Compliance Date

E. Amendments Required for Testing on/after New Energy Standard Compliance Date

F. Other Issues Under Consideration

G. Compliance with Other EPCA Requirements
9292Building Technologies Program | Program Name or Ancillary Text eere.energy.gov

• Consideration of Test Burden

• Standby and Off Mode Energy Use.

Other EPCA Requirements

This section addresses two other EPCA requirements.
9393Building Technologies Program | Program Name or Ancillary Text eere.energy.gov

• “ . . . test procedures . . . shall not be unduly 

burdensome to conduct.” – 42 U.S.C. 6293(b)(3)

• DOE considered the burden associated with these test 

procedure changes

• Most of the changes do not significantly affect requirements 

for test facility equipment and instrumentation or test time.

• Key changes that may significantly increase test burden:

– Variable anti-sweat heating test procedure.

– Icemaking test procedure.

• DOE currently is proposing a simplified approach to 

incorporation of icemaking energy use that would not 

impose additional test burden.

Other EPCA Requirements

Test Burden
9494Building Technologies Program | Program Name or Ancillary Text eere.energy.gov

• Manufacturers already have humidity-controlled chambers 

to verify humidity-affected performance of refrigerators and 

refrigerator-freezers.

• The proposed test represents the minimum amount of 

testing that could be done to measure and verify variable 

anti-sweat heating control.

• DOE is considering further test burden reduction by allowing 

the variable anti-sweat heating measurements for one 

product to be used for certification of products with the 

same variable anti-sweat heating system design.

Other EPCA Requirements

DOE concludes that the variable anti-sweat heating test 

procedure is not unduly burdensome.
9595Building Technologies Program | Program Name or Ancillary Text eere.energy.gov

• The current test procedures involve long periods of time, including 

times when the refrigeration system cycles off.

• Operation with the refrigerator shut down (i.e. not keeping the 

compartments refrigerated) are not applicable for refrigeration 

products.

• Standby and off modes of auxiliary features are captured in the 

current test procedure, which calls for the “lowest energy use 

position” –AHAM HRF-1-1979, section 7.4.2, AHAM HRF-1-2008,

sections 5.5.2 (e) and (f).

Other EPCA Requirements

The EPCA requirement to incorporate standby and off mode 

energy use are already satisfied by the current test procedure.
9696Building Technologies Program | Program Name or Ancillary Text eere.energy.gov

 Public Meeting – oral comments will be captured in the transcript and become part of the public record.

 Written comments – NOPR comment period open until 75 days after publication in the Federal Register Reference docket #: EERE-2009-BT-TP-0003 and/or RIN #: 

1904-AB92

Email: Refrig-2009-TP-0003@ee.doe.gov

Mail: Mrs. Brenda Edwards

U.S. Department of Energy

Building Technologies Program

1000 Independence Avenue, SW, Mailstop EE-2J

Washington, DC 20585-0121

Courier: Mrs. Brenda Edwards

U.S. Department of Energy

Building Technologies Program

950 L'Enfant Plaza, Suite 600

Washington, DC 20024

Telephone: (202) 586-2945

How to Submit Comments...

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