1 | Building Technologies 

BUILDING TECHNOLOGIES

Energy Conservation Program for Appliance Test Procedures Resid

and H

June 

EERE-2009-BT-TP-0004 1.2.002
2 | Building Technologies 

• Attendee self introductions• Role of the Facilitator• Ground rules (norms)

– Listen as an ally– Use short, succinct statements/keep to the po– Hold sidebar conversations outside the room– Focus on issues, not personalities– One person speak at a time (raise hand to be 

your name for the record)

– Set cell phones to silent/vibrate

• Housekeeping items

Welcome and Introduction

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Agenda

9:00 – 9:15 am9:15 – 9:45 am9:45 – 10:00 am10:00 – 10:10 am10:10 – 11:00 am11:00 – 11:15 am

Welcome, Introduction & AgenInterested Parties StatementsTest Procedure HistoryScope of Test Procedure ReviProposed Revisions Set #1 (eBreak

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Agenda (Continued)

11:15 – 12:00 pm12:00 – 12:15 pm12:15 – 12:20 pm12:20 – 12:30 pm12:30 pm

Proposed Revisions Set #2 (eRulemaking Schedule & ImpacSummary and Next StepsQuestions & Comments / ClosAdjourn

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In all correspondence, include all of the following:

– Energy Conservation Test Procedure for Residential C

Conditioners and Heat Pumps

– Docket Number EERE-2009-BT-TP-0004– Regulatory Identification Number (RIN) 1904-AB94

Federal eRulemaking Portal: http://www.regulations.goEmail: RCAC-HP-2009-TP-0004@ee.doe.gov

Comment period closes August 16, 2010

Postal Mail: 

Ms. Brenda EdwardsU.S. Department of EnergyBuilding Technologies ProgramMailstop EE-2J1000 Independence Avenue, S.W.Washington, DC 20585-0121

Courier: 

Ms. Brenda U.S. DepartBuilding Tec950 L’Enfan

WashingtonTelephone: 

Interested Parties Participation

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The Consensus Agreement

DOE is aware of and evaluating the merits of Eother topics relating to the Consensus Agreemalso aware of the interested parties‘ desire to afore mentioned issues. DOE is investigating tConsensus Agreement in part and in total and determination for the standard at a later time.

Therefore, please take that into account in you

and questions today . You may submit further you written comments to DOE.

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Interested Parties Statements

At this time DOE welcomes opening the notice of proposed rulemaking (Nresidential central air conditioners an(CAC) test procedure.

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1 Test Procedure History

Public Meeting Agenda

23

4

Scope of Test Procedure Revisions

Proposed Revision Set #1 (Effective w/ 

5

Proposed Revision Set #2 (Effective w/ 

Rulemaking Schedule and Impact on M

6 Summary, Next Steps, and Questions

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• Most recent revision: Final Rule published O

– Expand coverage (e.g., small-duct high-velocity, – Minor updates (e.g., reference standards).– Improve complementary sections of CFR on test

rating options (e.g., update highest sales volume definition, Alternative Rating Method submittal gu

– No changes that affect SEER and HSPF of minim

• Expectations following 2007 Final Rule pub

– Test procedure is adequate for foreseeable futur– Use as basis for upcoming Energy Conservation 

rulemaking.

Test Procedure History

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• Energy Independence and Security Act (EIS

– Signed into Law December 2007.– For CAC, up to two regional standards can be co

to the national standard.

– Must account for standby and off mode energy c

• DOE concludes that a test procedure rulem

to assure compliance with EISA and to consEISA test procedure updates.

Test Procedure History

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1 Test Procedure History

Public Meeting Agenda

23

4

Scope of Test Procedure Revisions

Proposed Revision Set #1 (Effective w/ 

5

Proposed Revision Set #2 (Effective w/ 

Rulemaking Schedule and Impact on M

6 Summary, Next Steps, and Questions

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Scope of Test Procedure Revisions

• Multi-split systems• Laboratory installation provisions• Test tolerances and in-situ calibration

– Indoor air flow– Temperature difference during the cyclic D 

• Address waiver requests

– Indoor unit having multiple blowers– Triple capacity, northern climate heat pump

• Miscellaneous items

• Standby /off mode energy consumption • Regional standards affect on test proce• Related extras /omissions

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1 Test Procedure History

Public Meeting Agenda

23

4

Scope of Test Procedure Revisions

Proposed Revision Set #1 (Effective w/ 

5

Proposed Revision Set #2 (Effective w/ 

Rulemaking Schedule and Impact on M

6 Summary, Next Steps, and Questions

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Multi-Split Systems

• Further revisions to the “Tested Combinatio

– Clarifying capacity references mean the nomin– Slightly broaden indoor combinations that qual– Not addressing requested change that would o

size multi-split systems.

• New minimum external statics for ducted m

– Alternative to industry proposal to use manufac– Consider applying these alternative external sta

split systems and furred down units.

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Multi-Split Systems

Rated Capacity 

Btu/h

Minimum External Resista

SDHV Ducted Multi-splits 

≤ 28,800 1.10 0.03 

29,000 – 42,500 1.15 0.05 

≥ 43,000 1.20 0.07 

*wc = water column

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Multi-Split Systems

NOPR Issue #2:Is a separate set of minimum external statacceptable way to address the testing of dsplits? 

Pubic Meeting Question #1:Should the alternative set of minimum extepressures be applied to (1) ducted mini-spducted furred down/ceiling-mounted units*

*Indoor unit no more than 11 in high and 24 in deep with singperpendicular to the flow stream and the system rated capaci39,000 Btu/h.

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Laboratory Installation Provisions

Propose adjustments to indoor blower setu

• On fixed speed or constant torque blow

reducing air volume as much as 10% bvalue to meet DOE minimum static befonext fan speed, pin or dip switch setting

• Add caveat that any incremental chang

blower configuration have to yield the sdelay characteristic.

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Laboratory Installation Provisions

Observations on blower coil setup procedu

• Goal of procedure: repeatable setups; 

ratings.

• TP currently allows reducing air volume • From modeling, a 10% reduction in air 

projected to decrease capacity by up to – Implication: more chance of failure 

unit is subject to a third-party certific

• SEER is projected to decrease by up to • SEER is expected to decrease more if 

to one fan setting one time and the nexanother time.

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Laboratory Installation Provisions

NOPR Issue #4:Will the proposed adjustments to the indoosetup procedure yield more repeatable labinstallations and more consistent SEER/H

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Laboratory Installation Provisions

Propose amendments to the refrigerant ch

• Cover the case where a range is given 

superheat, etc. Î use the midpoint val

• No adjusting charge after initial setup. • Delete language that allowed deviating 

charging instructions when testing so lomanufacturer thereafter revised those s

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Laboratory Installation Provisions

Expected outcome:

• Remove potential loop-hole for adjustin

charge after the testing process begins

• Published installation/charging instructi

overridden for DOE testing.

• Better alignment with procedures used 

certification testing.

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Laboratory Installation Provisions

Propose clarifications to the system setup 

• For DOE certification tests, a manufact

interact with a private testing laboratory manufacturer to conduct the tests.

• Specifically address the case where DO

tests are conducted on a pre-productioinstallation instructions are not yet publ

Expected outcome:

• Better differentiation between initial DO

testing and any testing conducted therecertification testing, DOE enforcement 

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Test Tolerances & In-Situ Calibration

Issue: Airflow test operating tolerances us

using an electronic pressure transdu

• 0.05 in wc tolerance for external resistance • 2.0 % of reading (rdg) tolerance for nozzle • Tolerances predate DOE TP: appeared in A• Relatively easy to meet tolerance if using l

because of their inherit damping.

• Different story if using a higher resolution e

pressure transducer; more noticeable for hand variable-speed blowers.

• Test operating tolerance used to confirm st

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Test Tolerances & In-Situ Calibration

Potential corrective actions considered by • Eliminate these two airflow test operating toler• Integrate the signals and calculate an average 

subintervals (e.g., 5 sec readings averaged for 

• Try to mechanically dampen the pressures to m

manometer (e.g., pressure snubber).

• Increase the magnitudes of the tolerances.

0.140.160.18

0.2

0.220.240.26

0 5 10 

External Static Pressure (in wc)

NOPR: Last Option0.05 in wc 0.12 in wc2.0 % rdg 8.0 % rdg

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Test Tolerances & In-Situ Calibration

NOPR Issue #5:Are greater tolerances the solution for assperformance when using electronic pressutransducers? If not, DOE is seeking commcorrective actions.

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Test Tolerances & In-Situ Calibration

Issue: need to reduce the measurement bi

using different air-side temperature sencyclic degradation coefficient (CD) tests

• Two companion tests used to calculate CD

(SS) and one cyclic (CYC).

• CD used in estimating EERcyc/EERss.

• To comply with ASHRAE Standard 41.1–19

may use two sets of temperature sensors.

– Highly accurate sensors during steady-stat– Comparatively less accurate but necessari

sensors for cyclic tests.

Problem: two sets of temperature sensors lead 

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Test Tolerances & In-Situ Calibration

DOE proposes to minimize the bias when d

cyclic degradation coefficient, CD, by:

correcting the ΔT measured during the 

on the ratio of the temperature differencusing the two sets of temperature senscompanion steady-state test. 

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Test Tolerances & In-Situ Calibration

Proposed ΔT correction process.

• During the steady-state test, measure Δ

of instrumentation at equal intervals thaor less.

• Calculate an average ΔT for SS sensor

ΔT for the CYC; ratio the two ΔT’s.

• Use the final ΔT ratio from the steady-s

the measured ΔT during the cyclic test.

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Test Tolerances & In-Situ Calibration

Proposed ΔT correction process (continue

• Proposed placing limits on the ΔT ratio 

and 1.06. A ratio outside this range wilrecalibration or replacement of one or b

• In an effort to avoid having to run a com

before evaluating whether the ΔT ratio 

allowed range, can calculate the ΔT rat

minimum of 7 data samples that are acinterval of 6 minutes or more.

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Address Waiver Requests

Proposed amendments to eliminate waiver 

having a multi-blower indoor unit:

Background: 

On 28 August 2008, DOE granted a waiver for blower indoor units that may be combined with heat pump outdoor unit, one two-capacity heaor two separate single-speed heat pump outdo

DOE Proposal:

Because the commercialization of these produkeep test procedure add-ons to a minimum an

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Address Waiver Requests

Proposed test procedure additions: multi-b

• Scope: 

– Cover products that use 2 to 8 indoor b

or dual-circuit indoor coil. 

• Simplifications: 

– Evaluate each system with all and with 

blowers operating.

– For two stage systems, high-stage com

evaluated with all blowers on; low-stagthe blowers on.

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Address Waiver Requests

Proposed amendments to eliminate waiver 

triple-capacity, northern heat pumps:

Background: • On 5 February 2010, DOE granted a waiver fo

pumps that offer 3 stages of compressor capaand 2 stages when cooling.– Changes needed for HSPF but not SEER d– NOPR slightly different from waiver decisio

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Address Waiver Requests

Proposed TP additions: triple-capacity nor• Additional laboratory testing at the 3rd heating 

• One new outdoor test condition – different in N

because of more achievable wet bulb (wb) dep

– 2 °F dry bulb (db) and 1 °F wb (proposed in NO– 0 °F db and -2 °F wb (listed in waiver)

• Heating building load assigned based on the 2

47 oF outdoor temperature.

• HSPF bin calculations are an extension of the 

two-stage heat pumps.

• Calculation algorithm accounts for systems tha

heating stages at any given outdoor temperatu

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Address Waiver Requests

NOPR Issue #10:Is the coverage for triple-capacity, northern and multiple blower indoor units sufficiently capturing the unique equipment features?

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Miscellaneous Items

Clarify inputs for the demand defrost credi• The demand defrost credit (Fdef) is a direct 

the HSPF calculation.

• Historically, Fdef has a value between 1.00 • In the October 2007 final rule, the maximu

was changed from 12 hours to 6 hours.

• The impact on the equation for Fdef was no

• Two possible corrective actions were cons

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Miscellaneous Items

Clarify inputs for the demand defrost credi

, 5.1

5.1

103.01

max

⎥⎦⎤ ⎢⎣⎡ −Δ −Δ −+= ττ def Fdef wh

τ def =Δ

τ max =Δ

the time between defrost terminations (in howhichever is greater, andmaximum time between defrosts as allowed hours) or 12, whichever is less.

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Potential corrective actions:• Update the equation for Fdef to use 6 hours as 

Δτmax rather than 12 hours.

• Keep current Fdef equation but clarify equation 

terminated based on the max time of 6 hours.

Miscellaneous Items

1

1.005

1.01

1.015

1.02

1.025

1.03

1.035

0 2 4 6 810 

Demand Defrost Factor (-)

Actual Interval of Demand Defrosts (hrs)

Pre 2007Option #2 (Current/NOPOption #1

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Implications:

• No change for heat pumps that defrost w

(99% of units?).

• Boost for heat pumps that defrost after 6 

Public Meeting Question #2:DOE seeks comments on the NOPR propthe equation for the demand defrost credi

Miscellaneous Items

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Miscellaneous Items

Propose to add calculations for sensible he

• Add to test procedure to endorse its co

Specific proposal to calculate SHR for t

• No extra test burden as measurements • DOE is not using SHR within the calcul• When humidity control is a concern, co

contractors may wish to know the SHR

• Adding the SHR to the yellow Energy G

only be considered via Federal Trade Crulemaking on the issue.

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Miscellaneous Items

Clarify that optional frost accumulation tes

conducted without forfeiting use of the • DOE test procedure allows using 0.25 C

if optional CD tests are conducted.

• Propose same practice for optional fros

tests.

• Use default or measured values for cap

at 35 °F, whichever contributes to a hig(Region IV, DHRmin).

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Miscellaneous Items

Propose to:

• Add references to ASHRAE 116 for equ

calculate SEER and HSPF for variable-

• Update test procedure references to th

standards of AHRI and ASHRAE.

EERE-2009-BT-TP-0004 1.2.002
42 | Building Technologies 

1 Test Procedure History

Public Meeting Agenda

23

4

Scope of Test Procedure Revisions

Proposed Revision Set #1 (Effective w/ 

5

Proposed Revision Set #2 (Effective w/ 

Rulemaking Schedule and Impact on M

6 Summary, Next Steps, and Questions

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43 | Building Technologies 

Standby / Off Mode Energy

Standby and Off-mode Energy Consumptio

• SEER accounts for all (modes of) ene

that occurs during the cooling season, when the air conditioner or heat pump 

• HSPF accounts for all (modes of) ene

during the heating season. 

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Standby / Off Mode Energy

Standby and Off-mode Energy Consumptio

• Energy consumed by an air conditioner 

heating season.

• Energy consumed by an air conditioner 

during the shoulder seasons.– Combination of location-specific coo

load hours translates to less than 8,7Appendix A of ASHRAE Std 137).

However, when considered on an annual baof the energy consumption is missed. 

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Standby / Off Mode Energy

Propose to account for out-of-season enerDefine Off-Mode:

• AC: time when the unit is powered but idle 

season and the shoulder seasons

• HP: same definition as AC except only ap

seasons

• Add laboratory testing• Add calculations

– P1 = representative off-mode power consu

shoulder seasons (AC & HP)

– P2 = representative off-mode power consu

conditioner during the heating season 

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Off-Mode Energy Consumption

Off-Mode laboratory testing

• Simple / short duration for models:

– Not having a compressor crankcase heate– Having a crankcase heater that operates c

• Mid duration for heat pumps having a c

that is thermostatically controlled.

• Longer duration for air conditioners hav

heater that is thermostatically controlled– Easier if heater is controlled based only on 

temperature sensor.

– More challenging as the control algorithm a

temperature sensor(s) create a heating pro

correlated to outdoor temperature.

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Off-Mode Energy Consumption

Off-Mode Energy Calculations

Shoulder Seasons: P1 * Shoulder SeaAC During Heating Season: P2 * Heat

Climatic

Region

Cooling 

Load

Hours

Heating 

Load 

Hours

Cooling 

Season 

Hours

I 2400 750 6731 

II 1800 1250 5048 

III 1200 1750 3365 

IV 800 2250 2244 

Rating Values 1000 2080 2805 

V 400 2750 1122 

VI 200 2750 561 

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Off-Mode Energy Consumption

Key Points:• Off-mode energy consumption will not be u

SEER or HSPF. Doing so would have the 

– Change the cooling season descriptor SEER in

descriptor for ACs and a part-year descriptor fo

– Change SEER from being regionally independe

the particular combination of Cooling Season HSeason Hours (HSH), and Shoulder Season H

• Require measurement of P1 and P2 when 

conservation standards become effective. 

• A minimum standard level for P1 and P2 is 

investigated.

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Off-Mode Energy Consumption

NOPR Issue #2:DOE seeks comments on the definition of 

Public Meeting Question #3:DOE seeks comment on the steps in propo3.13 in Appendix M for off-mode laboratory procedure for A/Cs and H/Ps having a thercontrolled compressor crankcase heater.

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Regional Standards Affect on Test Procedures

Task: Make necessary changes to the test 

allow consideration of regional standard

Influencing Factors / Constraints:

• Two additional regions of interest: hot-

– Focus on cooling

• EISA requirement: region must be cont• Dependent on regions established in st

rulemakings: CAC and F&B

• Current structure of test procedure:

– Generate performance map of system from – Estimate seasonal performance (SEER)

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Regional Standards Affect on Test Procedures

Test Procedure Options:

1. Make no changes to the existing test pr

respect to lab testing and/or calculationthe regulating metric for assigning a reg

2. Add only calculation steps to the proce

possibly use an SEER Hot-Dry, SEER 

etc. as the regulating metric

3. Add both lab testing and calculations to 

region-specific metric; could possibly uSEER Hot-Humid, etc as the metric.

NOPR: Includes Option #3 for SEE

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Regional Standards Affect on Test Procedures

What do we want from a regional regulating m• Information that promotes best use of energy r• Information that helps the consumer

– Seasonal energy consumption– Performance at conditions that impact demand 

installation of smart meters expands)

• Information that helps the electric utility

– Performance at full load conditions

• Information that helps manufacturer differentia

NOPR Issue #9:DOE seeks comment on usage and effectiveness oand the advantages and disadvantages of using EE

EERE-2009-BT-TP-0004 1.2.002
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Related Extras / Omissions

Extras:• Propose requirements for the low-voltage tran

testing coil-only units; clarify that transformer’s must be included in metered input to system.

• Proposed to change the minimum sampling int

state tests from 10 minutes to 5 minutes.

• Eliminate the short-cut method for calculating t

for single-speed systems; use bin method inst

– Can account for improvements in the A Test rel– Avoid confusion as to the basis of the short-cut 

– Promotes consistency across all SEER calcula

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Related Extras / Omissions

Omissions from the NOPR:• No explicit coverage of EER in NOPR.• Test procedure updates to better address thro

conditioners and heat pumps.

– Explicitly waive requirement for 10 feet of refrig– Use same or different refrigerant tubing length?– How/where to best measure the outdoor air tem

EERE-2009-BT-TP-0004 1.2.002
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1 Test Procedure History

Public Meeting Agenda

23

4

Scope of Test Procedure Revisions

Proposed Revision Set #1 (Effective w/ 

5

Proposed Revision Set #2 (Effective w/ 

Rulemaking Schedule and Impact on M

6 Summary, Next Steps, and Questions

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56 | Building Technologies 

Rulemaking Schedule

• Written comments due to DOE no later 

2010.

• Test procedure final rule expected to be 

2011

• Test procedure revisions to become eff

steps:– Set #1 revisions (e.g. non-EISA): 30 da– Set #2 revisions (e.g., EISA+): same ef

standards (6/30/2016).

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Impact on Manufacturers

• Test procedure revisions will not trigger im

or re-rating of any products.

• SEER and HSPF are not altered as a resu

procedure revisions introduced 30 days aft

By the time any amended energy efficiency 

become effective:

• SEER-Hot Dry (or EER if used) rating will b

equipment sold/installed in the hot-dry reg

• Off-mode energy parameters required for a• Will require testing some existing and new 

coverage within Alternative Rating Method

EERE-2009-BT-TP-0004 1.2.002
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1 Recent Test Procedure History

Public Meeting Agenda

23

4

Scope of Proposed Revisions

Proposed Revision Set #1 (Effective w/ 

5

Proposed Revision Set #2 (Effective w/ 

Rulemaking Schedule and Impact on M

6 Summary, Next Steps, and Questions

EERE-2009-BT-TP-0004 1.2.002
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Summary, Next Steps, and Questions

Submit written comments by August 16th.• In all correspondence, include all of the following:

– Energy Conservation Test Procedure for Reside

Conditioners and Heat Pumps.

– Docket Number EERE-2009-BT-TP-0004.– Regulatory Identification Number (RIN) 1904-A

Written transcript from today’s public meeting 

the DOE web site: http://www1.eere.energy.gov/buildings/appliaential/central_ac_hp.html

The efficiency levels proposed in the Consen

are being considered by DOE.

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Summary, Next Steps, and Questions

Next milestone event: Notice of Proposed 

the Energy Conservation Standards.

Energy Conservation Standards rulemaki

Procedure rulemaking will continue to concurrently.

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61 | Building Technologies 

• In all correspondence, include all of the following:

– Energy Conservation Test Procedure for Residential C

and Heat Pumps

– Docket Number EERE-2009-BT-TP-0004– Regulatory Identification Number (RIN) 1904-AB94

• Federal eRulemaking Portal: http://www.regulations.• Email: RCAC-HP-2009-TP-0004@ee.doe.gov

Final Note

Comment period closes Augu

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Summary, Next Steps, and Questions

EERE-2009-BT-TP-0004 1.2.002