1 | Energy Efficiency and Renewable Energy 

Test Procedures: Notice of

Proposed Rulemaking for

Packaged Terminal Air Conditionersand Packaged Terminal Heat Pumps

April 28, 2014

Appliance StaDepartment of Building Techno

EERE‐2012‐BT‐T

PTAC‐2012TP00

www.bryant.com 
2

Public Meeting Slides Topics

1 Introduction2 Regulatory History3 Covered Products4 Proposed Changes to Test Procedure5 Closing Remarks
3

Welcome• Introductions (around the room)

• Role of the Facilitator• Ground Rules

– Speak one at a time.

– Say your name for the record – there will be a complete tra

this meeting.

– Be concise – share the ‘air‐time’.

– Keep the focus here – cell phones on silent; limit sidebar

conversations.

– Webinar participants turn phone on mute; “raise your hand

recognized to speak.

• Housekeeping Items• Agenda Review• Opening Remarks
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Agenda

• 9:00 – 9:15 am Welcome, Introductions, Opening Statem

• 9:15 – 9:20 am Regulatory History• 9:20 – 9:30 am Covered Products• 9:30 – 11:30 am Test Procedure Amendments

• 11:30 – 12:00 am Closing Remarks
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Listening Via the Webcast• The Department is broadcasting this meeting live ov

Internet.

• DOE is providing the webcast to accommodate stake

that are unable to attend the public meeting in perso

• The web broadcast allows stakeholders to listen in an

the slides.

• All stakeholders are encouraged to submit written co

after the public meeting.
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Purpose of the Public Meeting• Present the procedural and analytical approaches to 

changes to the Test Procedure for Packaged Terminal 

Conditioners and Heat Pumps.

• Invite comment on the notice of proposed rulemakin

(NOPR) document.

• Discuss next steps in the rulemaking.

• Invite participants to provide summary comments or

statements and raise additional issues for discussion.
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Issues for DiscussionIssue box numbering corresponds to the list of issues published at 

of the NOPR document, available at:

http://www.regulations.gov/#!documentDetail;D=EERE‐2012‐BT‐T

0001The deadline for submitting comments is May 27, 2014.

Issue Box: DOE welcomes comments, data, and information concerning its proposed test procedufor packaged terminal air conditioners and heat pumps. Issues that correspond to those raised in DOE’s published material will be numbered in accordance with that material. Whether invited by issue box or not, comments are welcome on any pof DOE’s analysis.
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Opening Remarks

Meeting participants are invited to provide opening rem

statements at this time.
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Public Meeting Slides Topics

1 Introduction2 Regulatory History3 Covered Products4 Proposed Changes to Test Procedure5 Closing Remarks
10

Regulatory History• This test procedure rulemaking covers the packaged 

conditioners and heat pumps test procedures discusCFR 431.96.

• On December 8, 2006, DOE established the test proc

final rule (71 FR 71340).

– This rule incorporated ANSI/AHRI 310/380‐2004 by referen

• On May 16, 2012, DOE established a final rule for co

heating, air‐conditioning, and water‐heating equipm

(ASHRAE equipment) (77 FR 28928).

– This rule included amendments to the test procedure for P

PTHPs.
11

Current Rulemaking• On February 22, 2013, DOE published a notice of public meetin

availability of framework document for a rulemaking to conside

energy conservations standards rulemaking for PTACs and PTH

12252)

• The current test procedure references AHRI Standard 310/380‐

reference, which references ASHRAE Standard 16‐1999, ASHRA

58‐1986, and ASHRAE Standard 37‐1988.

• In the framework document, DOE sought comments on issues 

testing of PTACs and PTHPs, including:

– Equipment break‐in

– Wall sleeve sealing

– Pre‐filling the condensate pan

– Barometric pressure correction– Differences in ASHRAE Standard 16 and ASHRAE Standard 37
12

ASRAC Working Group• On February 26, 2013, the Appliance Standards and 

Federal Advisory Committee (ASRAC) formed a work

to engage in a negotiated rulemaking to amend com

HVAC certification requirements.

• The group recommended a number of test procedur

amendments for PTACs and PTHPs, including propos

– A standardized wall sleeve during testing

– A standardized filter during testing

– A standardized grill during testing

• DOE proposed these test procedure amendments w

modification in today’s rulemaking.
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Public Meeting Slides Topics

1 Introduction2 Regulatory History3 Covered Products4 Proposed Changes to Test Procedure5 Closing Remarks
14

Covered Products• EPCA defines packaged terminal air conditioners and 

terminal heat pumps as the following:

The term "packaged terminal air conditioner" means a wall sle

separate un‐encased combination of heating and cooling assem

specified by the builder and intended for mounting through the 

includes a prime source of refrigeration, separable outdoor louv

forced ventilation, and heating availability by builder's choice of 

water, steam, or electricity.

The term "packaged terminal heat pump" means a packaged te

air conditioner that utilizes reverse cycle refrigeration as its prim

source and should have supplementary heat source available to 

with the choice of hot water, steam, or electric resistant heat
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Public Meeting Slides Topics

1 Introduction2 Regulatory History3 Covered Products4 Proposed Changes to Test Procedure5 Closing Remarks
16

Current Test Procedure• The current DOE Test Procedure in 10 CFR 431.96 ref

AHRI 310/380‐2004, but omits Section 5.6.

• AHRI 310/380‐2004 references two potential metho

for standard cooling ratings:

– ANSI/ASHRAE 16 or

– ANSI/ASHRAE 37, except no secondary capacity check shall 

no duct shall be attached to the condenser

• AHRI 310/380 references the following for the stand

ratings:

– ANSI/ASHRAE 58 for units with reverse‐cycle capabilities
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Proposed Changes• DOE’s proposed changes to the test procedure includ• DOE also considered but did not propose changes fo

barometric pressure correction in ASHRAE standard 

part‐load efficiency metrics.

# Proposed Change

1 Explicitly allowing for a break‐in period (up to 20 hours)

2 Requiring sealing of gaps between wall sleeves and the test fac

3 Explicitly allowing for pre‐filling of the condensate drain pan w

4 Requiring ASHRAE 16 only as the method for measuring cooling 

5 Requiring testing using a 14‐inch deep wall sleeve

6 Requiring testing using the most typical filter option shipped w
18

Break‐In Duration• DOE asked for comment on the appropriate time required for b

whether it needed to be conducted inside the test chamber, in 

framework document published on February 22, 2013. 77 FR 1

• Break‐in, also called run‐in, refers to the operation of equipme

testing to cause preliminary compressor wear, which may impr

performance. DOE understands that many labs commonly inco

break‐in period before the start of efficiency tests for air condit

equipment.

• DOE's May 16, 2012 final rule for Small, Large, and Very Large C

Package Air Conditioners and Heat Pumps (ASHRAE equipment

28928, 28991, added a specification in the test procedure that 

optional break‐in period of up to 20 hours for many types of co

conditioning and heating equipment (but not PTACs or PTHPs).
19

Break‐in Duration Proposal• DOE is proposing allowing PTAC and PTHP testing to 

optional break‐in period of up to 20 hours, consisten

test procedure for other commercial air‐conditioningequipment.

• DOE is also proposing to require manufacturers to re

duration of the break‐in period in certification repor

Issue 1: DOE seeks comment on its proposal to add an optionperiod to the test procedure (up to 20 hours) for PTACs and PTwhether the duration of the proposed break-in period is approcommenters support longer break-in times, DOE also requests showing that break-in periods longer than 20 hours make a sigimpact on efficiency measurements for this equipment type.
20

Wall Sleeve Sealing• PTACs and PTHPs are tested in a facility with two rooms separa

dividing wall with an opening. The test sample is placed in the 

any remaining gaps between the dividing wall and the wall slee

the unit are filled with insulating material.

• Air leakage between the outdoor and indoor rooms through ga

the wall sleeve and the dividing wall can reduce the measured 

efficiency, which would contribute to test results unrepresenta

operation.

• The current test procedure does not explicitly allow for the gap 

test sample and the insulating material to be sealed to prevent 

leakage.
21

Wall Sleeve Sealing Proposal• To improve the repeatability of PTAC and PTHP testin

proposes to require that test facilities, when installin

and PTHPs in the test chamber, seal all potential leakbetween the wall sleeve and the dividing wall.

Issue 2: DOE seeks comments on the sealing of PTAC and PTsleeves to the test facility dividing wall, including whether the method of sealing should be specified in the test procedure, aa test has been developed that could be performed to verify thelimination of air leakage has been achieved.
22

Pre‐Filling Condensate Drain Pan• During operation, most PTACs and PTHPs transfer condensate t

condenses on the indoor side to the unit’s outdoor side, and d

water over the air‐inlet side of the condenser. This enhances t

of the outdoor coil in air‐conditioning mode.

• At the start of a test, PTACs and PTHPs may start with no water 

condensate pan, and as the test progresses, the unit approach

equilibrium state of operation in which the condensate level in 

stabilizes at a constant level. It can take several hours to reach 

state.

• To accelerate the testing process, test facilities typically add wa

condensate pan at the beginning of the test rather than waitin

to generate sufficient condensate to stabilize.
23

Pre‐Filling Condensate Drain Pan Proposal• DOE proposes to add a provision in its test procedure

431.96 to allow manufacturers the option of pre‐filli

condensate drain pan before starting the efficiency t

• The provision would not set requirements regarding 

purity or the water temperature that is to be used, a

no information indicating that this would impact the results.

Issue 3: DOE seeks comments on its proposal to permit the pthe condensate drain pan, including whether the mineral contewater or temperature of the water used would affect the measuand/or whether these data should be recorded and documentethe test records underlying certification.
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ASHRAE Standard 16 vs ASHRAE Standard 37• ANSI/AHRI Standard 310/380‐2004 indicates that either ASHRA

16‐1999 (a calorimeter‐based method) or ASHRAE Standard 37

psychrometric‐based method) may be used to determine cooli

The two test methods have significant differences that may inf

results, including whether outgoing evaporator air is allowed to 

back into the evaporator.

• DOE investigated potential differences in results between the t

by conducting experimental testing, and compared the energy 

ratio (EER) results, which showed a wide range of differences (f

1.0 Btu/h‐W) in results.
25

ASHRAE Standard 16 vs ASHRAE Standard 37 P• To standardize the testing of PTACs and PTHPs, DOE is proposin

that only ASHRAE Standard 16 be used when conducting a coo

for PTACs and PTHPs.

• DOE understands that there is an ongoing process to revise AS

Standard 16 to incorporate psychrometric testing similar to AS

Standard 37. Upon release of the updated standard, DOE may c

updates to the DOE test procedure to reference the new stand

rulemaking process.

Issue 3: DOE seeks comments on its proposal to designate AStandard 16 as the sole test method for measuring cooling effPTACs and PTHPs. Specifically, DOE is interested in the test bmanufacturers resulting from this proposed requirement, and there are PTAC or PTHP manufacturers that currently conduct significant number of tests using ASHRAE Standard 37.
26

Wall Sleeve Size• The DOE test procedure provides limited guidance on the type 

that should be used during testing.

• For standard size PTACs and PTHPs, the wall sleeve measures 4

and 16 inches high; however, there is no standardized depth. S

manufacturers offer extended wall sleeves in a variety of depth

inches) that can be used with any of their standard size PTACs o

believes that the use of varying test sleeve depths may affect m

results, due to the sleeve’s potential to affect airflow and fan p

DOE's survey of wall sleeve sizes on the market showed that th

common wall sleeve depth is 14 inches.

• The ASRAC Working Group discussed the issue of varying wall s

and voted to adopt the position that units should be tested usi

14 inch sleeve (Docket No. EERE‐2013‐BT‐NOC‐0023, No. 53, pg
27

Wall Sleeve Size Proposal• DOE proposes to add a provision to 10 CFR 431.96 to 

testing using a wall sleeve with a depth of 14 inches 

sleeve option that is closest to 14 inches in depth tha

available for the basic model being tested).

• This is consistent with the Working Group’s recomme

Issue 4: DOE seeks comments on its proposal to requirusing 14-inch deep wall sleeves. DOE is also interested there are any PTACs or PTHPs that cannot be tested witdeep wall sleeve.
28

Filter Requirement• PTACs or PTHPs generally ship with a filter to remove particulat

indoor airstream. There is currently no description in the DOE t

of the type of filter to be used during testing. While some PTAC

only have one filter option, some PTACs and PTHPs are shipped 

standard filter or a high efficiency filter. A high efficiency filter w

more air flow restriction, which can incrementally decrease air 

capacity or efficiency of the unit.

• The Working Group discussed the issue of varying air filter effic

Working Group voted to adopt the position that units should b

shipped” with respect to selecting a filter option (Docket No. E

NOC‐0023, No. 53, pg. 16).
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Filter Requirement Proposal• DOE proposes to add a provision to 10 CFR 431.96 to 

testing using a wall sleeve with a depth of 14 inches available wall sleeve option that is closest to 14 inchdepth).

• This is consistent with the Working Group’s recomme

Issue 4: DOE seeks comments on its proposal to requirusing standard filters.Issue 5: DOE also seeks comment on its proposal to reuse of MERV-3 filter for testing PTACs and PTHPs that dwith filters.
30

Barometric Pressure Correction• DOE requested detailed test data showing the relatio

capacity to barometric pressure in the framework doFR 12252 (Feb. 22, 2013).

• The DOE test procedure, in Section 6.1.3 of referenc

Standard 16, allows for adjustment of the capacity

measurement based on the tested barometric press

– ASHRAE 16: “The capacity may be increased 0.8% for each 

29.92 in. Hg.”

• DOE noted that there are some effects at higher altit

may increase capacity, but there are other competin

that may negate this decrease.
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Barometric Pressure Correction Proposal• Because DOE has not received any data to support th

of the barometric pressure correction from the DOE 

procedure, DOE is not proposing to amend or removprovision.

Issue 6: DOE seeks comments or data on the need for a barometric pressure correction for PTACs and PTHPs.
32

Part Load Metric and Varying Ambient Conditi• DOE received input from stakeholders during the framework m

issue of a full‐load metric versus a part‐load metric, and on con

defrost mode operation at 17 °F.

• The current DOE test procedure for PTACs and PTHPs measures 

heating efficiency in terms of EER and coefficient of performan

respectively. Both of these metrics measure the efficiency of th

running steadily at the maximum cooling or heating output set

• DOE is unaware of any data showing the time PTACs and PTHPs 

operating in part‐load conditions versus full‐load conditions.

• Likewise, DOE is not aware of any data showing the amount of 

PTHPs with defrost capabilities spend at different outdoor tem

specifically at 17 °F compared with that at 47 °F.
33

Part Load Metric Proposal• DOE is not proposing to adopt either a part‐load or s

efficiency metric for the cooling mode that considers performance, or a seasonal efficiency metric for the 

mode that considers electric resistance heating for PPTHPs.

Issue 6: DOE seeks comments on its proposal not to deseasonal efficiency metrics that would evaluate part-loaoperation of PTACs and PTHPs or the impact of electric heating in low ambient temperatures for PTHPs. DOE alsany information regarding seasonal load patterns for PTPTHPs in both cooling and heating modes.
34

Compliance Date Proposal• The proposed test procedure amendments for PTACs and PTHP

contain changes that would materially alter the measured ene

of equipment. Rather, most of the proposed changes represent 

that would improve the uniform application of the test proced

equipment.

• DOE's test procedure proposals being considered in this notice 

effective 30 days after publication of the final rule in the Feder

• Consistent with 42 U.S.C. 6314(d), any representations of energ

consumption of PTACs and PTHPs must be based on any final a

procedures 360 days after the publication of the test procedur
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Certification and Enforcement Provisions• DOE has also proposed adding product‐specific enfo

provisions for the verification of cooling capacity.

– The standard equations for EER and COP in 10 CFR 431.97 a

the cooling capacity of the unit.

Proposed 10 CFR 429.134 (e): “The total cooling capacity of the basic model wmeasured pursuant to the test requirements of part 431 for each unit tested. T

the measurement(s) will be averaged and compared to the value of cooling cap

certified by the manufacturer. The certified cooling capacity will be considered 

the measurement is within five percent of the certified cooling capacity.

(i) If the certified cooling capacity is found to be valid, that cooling capacity 

as the basis for calculation of the EER and, if applicable, the COP energy c

standard that applies to the given basic model.

(ii) If the certified cooling capacity is found to be invalid, the average measu

capacity will serve as the basis for calculation of the EER and, if applicable

energy conservation standard that applies to the given basic model.”
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Public Meeting Slides Topics

1 Introduction2 Regulatory History3 Covered Products4 Proposed Changes to Test Procedure5 Closing Remarks
37

How to Submit Written CommentsIn all correspondence, please refer to the PTAC TP rulemaking by

– NOPR for Test Procedures for Packaged Terminal Air Condit

Packaged Terminal Heat Pumps

– Docket Number EERE‐2012‐BT‐TP‐0032

– Regulation Identification Number (RIN) 1904‐AD19

Email: PTAC‐2012TP0032@ee.doe.gov

Postal: CourierMs. Brenda Edwards Ms. Brenda Edwards

U.S. Department of Energy U.S. Department of Energy

Building Technologies Program, Building Technologies Prog

Mailstop EE‐5B 950 L’Enfant Plaza SW, Sui

1000 Independence Avenue, SW Washington, DC 20024

Washington, DC 20585‐0121 Tel: 202 586‐2945

Comment period closes May 27, 2014, 11:59 PM