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contains regulatory documents having general

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are keyed to and codified in the Code of

Federal Regulations, which is published under

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Rules and Regulations Federal Register

53625 

Vol. 78, No. 169 

Friday, August 30, 2013 

DEPARTMENT OF ENERGY 

10 CFR Part 430 

[Docket No. EERE–2013–BT–STD–0009] 

RIN 1904–AC96 

Energy Conservation Program for 

Consumer Products: Test Procedures 

for Residential Furnaces and Boilers; 

Correction 

AGENCY: Office of Energy Efficiency and 

Renewable Energy, Department of 

Energy. 

ACTION: Final rule; technical correction. 

SUMMARY: On July 10, 2013 the U.S. 

Department of Energy (DOE) published 

a final rule in the Federal Register that 

amended the test procedure for 

residential furnaces and boilers (78 FR 

41265). Due to drafting errors, that 

document incorrectly redesignated 

several subsections in section 10 of the 

DOE test procedure regulation for those 

products in the Code of Federal 

Regulations (CFR). This final rule 

corrects those errors and updates related 

cross-references to reflect the revised 

section numbers in section 10. 

DATES: Effective Date: August 30, 2013. 

The incorporation by reference of 

certain publications listed in the 

regulations was approved by the 

Director of the Federal Register as of 

November 10, 1997. 

FOR FURTHER INFORMATION CONTACT: 

Ms. Ashley Armstrong, U.S. Department 

of Energy, Office of Energy Efficiency 

and Renewable Energy, Building 

Technologies Office, EE–2J, 1000 

Independence Avenue SW., 

Washington, DC 20585–0121. 

Telephone: (202) 586–6590. Email: 

residential_furnaces_and_boilers@

ee.doe.gov. 

Mr. Eric Stas, U.S. Department of 

Energy, Office of the General Counsel, 

GC–71, 1000 Independence Avenue 

SW., Washington, DC 20585–0121. 

Telephone: (202) 586–9507. Email: 

Eric.Stas@hq.doe.gov. 

SUPPLEMENTARY INFORMATION: 

I. Background 

On July 10, 2013, DOE’s Office of 

Energy Efficiency and Renewable 

Energy published a test procedure final 

rule in the Federal Register titled, ‘‘Test 

Procedures for Residential Furnaces and 

Boilers’’ (hereafter referred to as the 

‘‘July 2013 final rule’’). 78 FR 41265. 

Since the publication of that final rule, 

it has come to DOE’s attention that, due 

to a technical oversight, a certain part of 

the July 2013 final rule incorrectly 

redesignated the numbering of 

subsections within section 10 of DOE’s 

test procedure regulations for residential 

furnaces and boilers found at 10 CFR, 

part 430, subpart B, Appendix N, 

‘‘Uniform Test Method for Measuring 

the Energy Consumption of Furnaces 

and Boilers.’’ In addition, the July 2013 

final rule did not include instructions to 

update the cross-references within 

Appendix N to reflect the renumbered 

subsections. During the development of 

amended test procedure for residential 

furnaces and boilers, DOE did not 

intend to redesignate the sections as 

indicated on page 41272 of the July 

2013 final rule, and did intend to 

update the cross-references within 

Appendix N to reflect the appropriate 

section renumbering. Instead, these 

incorrect redesignations were the result 

of drafting errors in the final rule. 

Today’s final rule corrects these errors 

by appropriately redesignating the 

subsections within section 10 of 

Appendix N and updating the internal 

cross-references in Appendix N to 

reflect the revised subsection 

numbering. 

II. Need for Correction 

As published, the identified 

provisions in section 10 of 10 CFR part 

430, subpart B, Appendix N will 

potentially result in confusion regarding 

how to correctly conduct DOE’s 

residential furnaces and boilers test 

procedure. It was clearly not DOE’s 

intention to change or eliminate 

additional sections beyond those 

explicitly cited for revision. At no place 

in the July 2013 final rule (or in the 

February 4, 2013 notice of proposed 

rulemaking that preceded it (78 FR 

7681)) did DOE discuss such 

modifications. These were inadvertent 

changes. Because today’s final rule 

would simply effectuate the intended 

and proper renumbering of the relevant 

regulatory provisions without making 

substantive changes to those provisions, 

the changes addressed in this document 

are technical in nature. Accordingly, 

DOE finds that there is good cause 

under 5 U.S.C. 553(b)(B) to not issue a 

separate notice to solicit public 

comment on the changes contained in 

this document. Issuing a separate notice 

to solicit public comment would be 

impractical, unnecessary, and contrary 

to the public interest. 

III. Procedural Requirements 

DOE has concluded that the 

determinations made pursuant to the 

various procedural requirements 

applicable to the July 10, 2013 test 

procedure final rule remain unchanged 

for this final rule technical correction. 

These determinations are set forth in the 

July 10, 2013 final rule. 78 FR 41265, 

41269–41272. 

List of Subjects in 10 CFR Part 430 

Administrative practice and 

procedure, Confidential business 

information, Energy conservation, 

Household appliances, Imports, 

Incorporation by reference, 

Intergovernmental relations, Small 

businesses. 

Issued in Washington, DC on August 23, 

2013. 

Kathleen B. Hogan, 

Deputy Assistant Secretary for Energy 

Efficiency, Energy Efficiency and Renewable 

Energy. 

For the reasons stated in the 

preamble, DOE amends part 430 of 

Chapter II, subchapter D of title 10, 

Code of Federal Regulations as set forth 

below: 

PART 430—ENERGY CONSERVATION 

PROGRAM FOR CONSUMER 

PRODUCTS 

■ 1. The authority citation for part 430 

continues to read as follows: 

Authority: 42 U.S.C. 6291–6309; 28 U.S.C. 

2461 note. 

■ 2. Appendix N to subpart B of part 

430 is amended by revising the 

introductory text after the appendix 

heading and sections 10.0 through 10.11 

to read as follows: 


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Appendix N to Subpart B of Part 430— 

Uniform Test Method for Measuring the 

Energy Consumption of Furnaces and 

Boilers 

Note: The procedures and calculations that 

refer to off mode energy consumption (i.e., 

sections 8.6 and 10.11 of this appendix N) 

need not be performed to determine 

compliance with energy conservation 

standards for furnaces and boilers at this 

time. However, any representation related to 

standby mode and off mode energy 

consumption of these products made after 

July 1, 2013 must be based upon results 

generated under this test procedure, 

consistent with the requirements of 42 U.S.C. 

6293(c)(2). For furnaces manufactured on or 

after May 1, 2013, compliance with the 

applicable provisions of this test procedure is 

required in order to determine compliance 

with energy conservation standards. For 

boilers, the statute requires that after July 1, 

2010, any adopted energy conservation 

standard shall address standby mode and off 

mode energy consumption for these 

products, and upon the compliance date for 

such standards, compliance with the 

applicable provisions of this test procedure 

will be required. 

* * * * * 

10.0 Calculation of derived results from 

test measurements. Calculations shall be as 

specified in section 11 of ANSI/ASHRAE 

103–1993 (incorporated by reference, see 

§ 430.3) and the October 24, 1996, Errata 

Sheet for ASHRAE 103–1993, except for 

sections 11.5.11.1, 11.5.11.2, and appendices 

B and C; and as specified in sections 10.1 

through 10.11 and Figure 1 of this appendix. 

10.1 Annual fuel utilization efficiency. 

The annual fuel utilization efficiency (AFUE) 

is as defined in sections 11.2.12 (noncondensing systems), 11.3.12 (condensing 

systems), 11.4.12 (non-condensing 

modulating systems), and 11.5.12 

(condensing modulating systems) of ANSI/

ASHRAE 103–1993 (incorporated by 

reference, see § 430.3), except for the 

definition for the term EffyHS in the defining 

equation for AFUE. EffyHS is defined as: 

EffyHS = heating seasonal efficiency as 

defined in sections 11.2.11 (non-condensing 

systems), 11.3.11 (condensing systems), 

11.4.11 (non-condensing modulating 

systems), and 11.5.11 (condensing 

modulating systems) of ANSI/ASHRAE 103– 

1993, except that for condensing modulating 

systems sections 11.5.11.1 and 11.5.11.2 are 

replaced by sections 10.2 and 10.3 of this 

appendix. EffyHS is based on the assumptions 

that all weatherized warm air furnaces or 

boilers are located outdoors, that warm air 

furnaces which are not weatherized are 

installed as isolated combustion systems, and 

that boilers which are not weatherized are 

installed indoors. 

10.2 Part-Load Efficiency at Reduced Fuel 

Input Rate. Calculate the part-load efficiency 

at the reduced fuel input rate, EffyU,R, for 

condensing furnaces and boilers equipped 

with either step modulating or two-stage 

controls, expressed as a percent and defined 

as: 

Where: 

LL,A = value as defined in section 11.2.7 of 

ASHRAE 103–1993, 

LG = value as defined in section 11.3.11.1 of 

ASHRAE 103–1993 at reduced input 

rate, 

LC = value as defined in section 11.3.11.2 of 

ASHRAE 103–1993 at reduced input 

rate, 

LJ = value as defined in section 11.4.8.1.1 of 

ASHRAE 103–1993 at maximum input 

rate, 

tON = value as defined in section 11.4.9.11 of 

ASHRAE 103–1993, 

QP = pilot flame fuel input rate determined 

in accordance with section 9.2 of 

ASHRAE 103–1993 in Btu/h, 

QIN = value as defined in section 11.4.8.1.1 

of ASHRAE 103–1993, 

tOFF = value as defined in section 11.4.9.12 

of ASHRAE 103–1993 at reduced input 

rate, 

LS,ON = value as defined in section 11.4.10.5 

of ASHRAE 103–1993 at reduced input 

rate, 

LS,OFF = value as defined in section 11.4.10.6 

of ASHRAE 103–1993 at reduced input 

rate, 

LI,ON = value as defined in section 11.4.10.7 

of ASHRAE 103–1993 at reduced input 

rate, 

LI,OFF = value as defined in section 11.4.10.8 

of ASHRAE 103–1993 at reduced input 

rate, 

CJ = jacket loss factor and equal to: 

= 0.0 for furnaces or boilers intended to be 

installed indoors 

= 1.7 for furnaces intended to be installed 

as isolated combustion systems 

= 2.4 for boilers (other than finned-tube 

boilers) intended to be installed as 

isolated combustion systems 

= 3.3 for furnaces intended to be installed 

outdoors 

= 4.7 for boilers (other than finned-tube 

boilers) intended to be installed outdoors 

= 1.0 for finned-tube boilers intended to be 

installed outdoors 

= 0.5 for finned-tube boilers intended to be 

installed in internal combustion system 

applications 

LS,SS = value as defined in section 11.5.6 of 

ASHRAE 103–1993 at reduced input 

rate, 


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CS = value as defined in section 11.5.10.1 of 

ASHRAE 103–1993 at reduced input 

rate. 

10.3 Part-Load Efficiency at Maximum 

Fuel Input Rate. Calculate the part-load 

efficiency at maximum fuel input rate, 

EffyU,H, for condensing furnaces and boilers 

equipped with two-stage controls, expressed 

as a percent and defined as: 

Where: 

LL,A = value as defined in section 11.2.7 of 

ASHRAE 103–1993, 

LG = value as defined in section 11.3.11.1 of 

ASHRAE 103–1993 at maximum input 

rate, 

LC = value as defined in section 11.3.11.2 of 

ASHRAE 103–1993 at maximum input 

rate, 

LJ = value as defined in section 11.4.8.1.1 of 

ASHRAE 103–1993 at maximum input 

rate, 

tON = value as defined in section 11.4.9.11 of 

ASHRAE 103–1993, 

QP = pilot flame fuel input rate determined 

in accordance with section 9.2 of 

ASHRAE 103–1993 in Btu/h, 

QIN = value as defined in section 11.4.8.1.1 

of ASHRAE 103–1993, 

tOFF = value as defined in section 11.4.9.12 

of ASHRAE 103–1993 at maximum input 

rate, 

LS,ON = value as defined in section 11.4.10.5 

of ASHRAE 103–1993 at maximum input 

rate, 

LS,OFF = value as defined in section 11.4.10.6 

of ASHRAE 103–1993 at maximum input 

rate, 

LI,ON = value as defined in section 11.4.10.7 

of ASHRAE 103–1993 at maximum input 

rate, 

LI,OFF = value as defined in section 11.4.10.8 

of ASHRAE 103–1993 at maximum input 

rate, 

CJ = value as defined in section 10.2 of this 

appendix, 

LS,SS = value as defined in section 11.5.6 of 

ASHRAE 103–1993 at maximum input 

rate, 

CS = value as defined in section 11.5.10.1 of 

ASHRAE 103–1993 at maximum input 

rate. 

10.4 National average burner operating 

hours, average annual fuel energy 

consumption, and average annual auxiliary 

electrical energy consumption for gas or oil 

furnaces and boilers. 

10.4.1 National average number of burner 

operating hours. For furnaces and boilers 

equipped with single stage controls, the 

national average number of burner operating 

hours is defined as: 

BOHSS = 2,080 (0.77) A DHR¥2,080 B 

Where: 

2,080 = national average heating load hours 

0.77 = adjustment factor to adjust the 

calculated design heating requirement 

and heating load hours to the actual 

heating load experienced by the heating 

system 

DHR = typical design heating requirements as 

listed in Table 8 (in unit of kBtu/h) of 

ANSI/ASHRAE Standard 103–1993, 

using the proper value of QOUT defined 

in 11.2.8.1 of ANSI/ASHRAE Standard 

103–1993 

A = 100,000/[341,300(yP PE + yIG PEIG + yBE) 

+ (QIN ¥QP)EffyHS ], for forced draft unit, 

indoors 

= 100,000/[341,300(yP PE Effmotor + yIG PEIG

+ y BE) + (QIN ¥QP)EffyHS ], for forced 

draft unit, ICS, 

= 100,000/[341,300(yP PE(1 ¥ Effmotor) + 

yIG PEIG + y BE) + (QIN ¥QP)EffyHS ], for 

induced draft unit, indoors, and 

= 100,000/[341,300(yIG PEIG + yBE) + (QIN

¥QP)EffyHS ], for induced draft unit, ICS 

B = 2 QP (EffyHS)(A)/100,000 

Where: 

Effmotor = Power burner motor efficiency 

provided by manufacturer, 

= 0.50, an assumed default power burner 

efficiency if not provided by 

manufacturer. 

100,000 = factor that accounts for percent 

and kBtu 

PE = burner electrical power input at fullload steady-state operation, including 

electrical ignition device if energized, as 

defined in 9.1.2.2 of ANSI/ASHRAE 

Standard 103–1993 

yP = ratio of induced or forced draft blower 

on-time to average burner on-time, as 

follows: 

1 for units without post purge; 

1 + (tP/3.87) for single-stage furnaces with 

post purge; 

1 + (tP/10) for two-stage and step 

modulating furnaces with post purge; 

1 + (tP/9.68) for single-stage boilers with 

post purge; or 

1 + (tP/15) for two-stage and step 

modulating boilers with post purge. 

PEIG = electrical input rate to the interrupted 

ignition device on burner (if employed), 

as defined in 8.1 of this appendix 

yIG = ratio of burner interrupted ignition 

device on-time to average burner ontime, as follows: 

0 for burners not equipped with 

interrupted ignition device; 

(tIG/3.87) for single-stage furnaces; 

(tIG/10) for two-stage and step modulating 

furnaces; 

(tIG/9.68) for single-stage boilers; or 

(tIG/15) for two-stage and step modulating 

boilers. 

tIG = on-time of the burner interrupted 

ignition device, as defined in 8.1 of this 

appendix 


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tP = post purge time as defined in 8.2 

(furnace) or 8.4 (boiler) of this appendix 

= 0 if tP is equal to or less than 30 seconds. 

y = ratio of blower or pump on-time to 

average burner on-time, as follows: 

1 for furnaces without fan delay; 

1 for boilers without a pump delay; 

1 + (t+ ¥ t¥)/3.87 for single-stage furnaces 

with fan delay; 

1 + (t+ ¥ t¥)/10 for two-stage and step 

modulating furnaces with fan delay; 

1 + (t+/9.68) for single-stage boilers with 

pump delay; or 

1 + (t+/15) for two-stage and step 

modulating boilers with pump delay. 

BE = circulating air fan or water pump 

electrical energy input rate at full-load 

steady-state operation, as defined in 

ANSI/ASHRAE Standard 103–1993 

QIN = as defined in 11.2.8.1 of ANSI/

ASHRAE Standard 103–1993 

QP = as defined in 11.2.11 of ANSI/ASHRAE 

Standard 103–1993 

EffyHS = as defined in 11.2.11 (noncondensing systems) or 11.3.11.3 

(condensing systems) of ANSI/ASHRAE 

Standard 103–1993, percent, and 

calculated on the basis of: 

ICS installation, for non-weatherized warm 

air furnaces; 

indoor installation, for non-weatherized 

boilers; or 

outdoor installation, for furnaces and 

boilers that are weatherized. 

2 = ratio of the average length of the heating 

season in hours to the average heating 

load hours 

t + = as defined in 9.5.1.2 of ANSI/

ASHRAE Standard 103–1993 or 8.4 of 

this appendix 

t¥ = as defined in 9.6.1 of ANSI/ASHRAE 

Standard 103–1993 

10.4.1.1 For furnaces and boilers 

equipped with two-stage or step modulating 

controls, the average annual energy used 

during the heating season, EM, is defined as: 

EM = (QIN ¥QP) BOHSS + (8,760¥4,600)QP

Where: 

QIN = as defined in 11.4.8.1.1 of ANSI/

ASHRAE Standard 103–1993 

QP = as defined in 11.4.12 of ANSI/ASHRAE 

Standard 103–1993 

BOHSS = as defined in section 10.4.1 of this 

appendix, in which the weighted EffyHS

as defined in 11.4.11.3 or 11.5.11.3 of 

ANSI/ASHRAE Standard 103–1993 is 

used for calculating the values of A and 

B, the term DHR is based on the value 

of QOUT defined in 11.4.8.1.1 or 

11.5.8.1.1 of ANSI/ASHRAE Standard 

103–1993, and the term (yP PE + yIGPEIG

+ yBE) in the factor A is increased by the 

factor R, which is defined as: 

R = 2.3 for two-stage controls 

= 2.3 for step modulating controls when 

the ratio of minimum-to-maximum 

output is greater than or equal to 0.5 

= 3.0 for step modulating controls when 

the ratio of minimum-to-maximum 

output is less than 0.5 

A = 100,000/[341,300(yP PE + yIG PEIG + y 

BE) R + (QIN ¥QP) EffyHS ], for forced 

draft unit, indoors 

= 100,000/[341,300(yP PE Effmotor + yIG PEIG

+ y BE) R + (QIN ¥QP)EffyHS ], for forced 

draft unit, ICS, 

= 100,000/[341,300(yP PE(1-Effmotor) + yIG

PEIG + y BE) R + (QIN ¥QP) EffyHS ], for 

induced draft unit, indoors, and 

= 100,000/[341,300(yIG PEIG + y BE) R + 

(QIN ¥QP) EffyHS ], for induced draft 

unit, ICS 

Where: 

Effmotor = Power burner motor efficiency 

provided by manufacturer, 

= 0.50, an assumed default power burner 

efficiency if none provided by 

manufacturer. 

EffyHS = as defined in 11.4.11.3 or 11.5.11.3 

of ANSI/ASHRAE Standard 103–1993, 

and calculated on the basis of: 

—ICS installation, for non-weatherized 

warm air furnaces 

—indoor installation, for non-weatherized 

boilers 

—outdoor installation, for furnaces and 

boilers that are weatherized 

8,760 = total number of hours per year 

4,600 = as specified in 11.4.12 of ANSI/

ASHRAE Standard 103–1993 

10.4.1.2 For furnaces and boilers 

equipped with two-stage or step modulating 

controls, the national average number of 

burner operating hours at the reduced 

operating mode is defined as: 

BOHR = XR EM/QIN,R

Where: 

XR = as defined in 11.4.8.7 of ANSI/ASHRAE 

Standard 103–1993 

EM = as defined in section 10.4.1.1 of this 

appendix 

QIN,R = as defined in 11.4.8.1.2 of ANSI/

ASHRAE Standard 103–1993 

10.4.1.3 For furnaces and boilers 

equipped with two-stage controls, the 

national average number of burner operating 

hours at the maximum operating mode 

(BOHH) is defined as: 

BOHH = XH EM/QIN

Where: 

XH = as defined in 11.4.8.6 of ANSI/ASHRAE 

Standard 103–1993 

EM = as defined in section 10.4.1.1 of this 

appendix 

QIN = as defined in 11.4.8.1.1 of ANSI/

ASHRAE Standard 103–1993 

10.4.1.4 For furnaces and boilers 

equipped with step modulating controls, the 

national average number of burner operating 

hours at the modulating operating mode 

(BOHM) is defined as: 

BOHM = XH EM/QIN,M

Where: 

XH = as defined in 11.4.8.6 of ANSI/ASHRAE 

Standard 103–1993 

EM = as defined in section 10.4.1.1 of this 

appendix 

QIN,M = QOUT,M/(EffySS,M/100) 

QOUT,M = as defined in 11.4.8.10 or 11.5.8.10 

of ANSI/ASHRAE Standard 103–1993, as 

appropriate 

EffySS,M = as defined in 11.4.8.8 or 11.5.8.8 

of ANSI/ASHRAE Standard 103–1993, as 

appropriate, in percent 

100 = factor that accounts for percent 

10.4.2 Average annual fuel energy 

consumption for gas or oil fueled furnaces or 

boilers. For furnaces or boilers equipped with 

single-stage controls, the average annual fuel 

energy consumption (EF) is expressed in Btu 

per year and defined as: 

EF = BOHSS (QIN ¥QP)+8,760 QP

Where: 

BOHSS = as defined in 10.4.1 of this appendix 

QIN = as defined in 11.2.8.1 of ANSI/

ASHRAE Standard 103–1993 

QP = as defined in 11.2.11 of ANSI/ASHRAE 

Standard 103–1993 

8,760 = as specified in 10.4.1.1 of this 

appendix 

10.4.2.1 For furnaces or boilers equipped 

with either two-stage or step modulating 

controls, EF is defined as: 

EF = EM + 4,600QP

Where: 

EM = as defined in 10.4.1.1 of this appendix 

4,600 = as specified in 11.4.12 of ANSI/

ASHRAE Standard 103–1993 

QP = as defined in 11.2.11 of ANSI/ASHRAE 

Standard 103–1993 

10.4.3 Average annual auxiliary electrical 

energy consumption for gas or oil-fueled 

furnaces or boilers. For furnaces and boilers 

equipped with single-stage controls, the 

average annual auxiliary electrical 

consumption (EAE) is expressed in kilowatthours and defined as: 

EAE = BOHSS (yP PE + yIG PEIG + yBE) + ESO

Where: 

BOHSS = as defined in 10.4.1 of this appendix 

PE = as defined in 10.4.1 of this appendix 

yP = as defined in 10.4.1 of this appendix 

yIG = as defined in 10.4.1 of this appendix 

PEIG = as defined in 10.4.1 of this appendix 

y = as defined in 10.4.1 of this appendix 

BE = as defined in 10.4.1 of this appendix 

ESO = as defined in 10.11 of this appendix. 

10.4.3.1 For furnaces or boilers equipped 

with two-stage controls, EAE is defined as: 

EAE = BOHR (yP PER + yIG PEIG + yBER) + 

BOHH (yP PEH + yIG PEIG + y BEH) + ESO

Where: 

BOHR = as defined in 10.4.1.2 of this 

appendix 

yP = as defined in 10.4.1 of this appendix 

PER = as defined in 9.1.2.2 and measured at 

the reduced fuel input rate of ANSI/

ASHRAE Standard 103–1993, 

(incorporated by reference, see § 430.3) 

yIG = as defined in 10.4.1 of this appendix 

PEIG = as defined in 10.4.1 of this appendix 

y = as defined in 10.4.1 of this appendix 

BER = as defined in 9.1.2.2 of ANSI/ASHRAE 

Standard 103–1993, (incorporated by 

reference, see § 430.3) measured at the 

reduced fuel input rate 

BOHH = as defined in 10.4.1.3 of this 

appendix 

PEH = as defined in 9.1.2.2 of ANSI/ASHRAE 

Standard 103–1993, (incorporated by 

reference, see § 430.3) measured at the 

maximum fuel input rate 

BEH = as defined in 9.1.2.2 of ANSI/ASHRAE 

Standard 103–1993, (incorporated by 

reference, see § 430.3) measured at the 

maximum fuel input rate 

ESO = as defined in 10.11 of this appendix. 

10.4.3.2 For furnaces or boilers equipped 

with step-modulating controls, EAE is defined 

as: 

EAE = BOHR (yP PER + yIG PEIG + yBER) + 

BOHM (yP PEH + yIG PEIG + y BEH) + ESO


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Where: 

BOHR = as defined in 10.4.1.2 of this 

appendix 

yP = as defined in 10.4.1 of this appendix 

PER = as defined in 9.1.2.2 of ANSI/ASHRAE 

Standard 103–1993, (incorporated by 

reference, see § 430.3), measured at the 

reduced fuel input rate 

yIG = as defined in 10.4.1 of this appendix 

PEIG = as defined in 10.4.1 of this appendix 

y = as defined in 10.4.1 of this appendix 

BER = as defined in 9.1.2.2 of ANSI/ASHRAE 

Standard 103–1993, (incorporated by 

reference, see § 430.3) measured at the 

reduced fuel input rate 

BOHM = as defined in 10.4.1.4 of this 

appendix 

PEH = as defined in 9.1.2.2 of ANSI/ASHRAE 

Standard 103–1993, (incorporated by 

reference, see § 430.3) measured at the 

maximum fuel input rate 

BEH = as defined in 9.1.2.2 of ANSI/ASHRAE 

Standard 103–1993, (incorporated by 

reference, see § 430.3) measured at the 

maximum fuel input rate 

ESO = as defined in 10.11 of this appendix. 

10.5 Average annual electric energy 

consumption for electric furnaces or boilers. 

EE = 100(2,080)(0.77)DHR/(3.412 AFUE) + 

ESO

Where: 

100 = to express a percent as a decimal 

2,080 = as specified in 10.4.1 of this 

appendix 

0.77 = as specified in 10.4.1 of this appendix 

DHR = as defined in 10.4.1 of this appendix 

3.412 = conversion to express energy in terms 

of watt-hours instead of Btu 

AFUE = as defined in 11.1 of ANSI/ASHRAE 

Standard 103–1993 (incorporated by 

reference, see § 430.3), in percent, and 

calculated on the basis of: ICS 

installation, for non-weatherized warm 

air furnaces; indoor installation, for nonweatherized boilers; or outdoor 

installation, for furnaces and boilers that 

are weatherized. 

ESO = as defined in 10.11 of this appendix. 

10.6 Energy factor. 

10.6.1 Energy factor for gas or oil 

furnaces and boilers. Calculate the energy 

factor, EF, for gas or oil furnaces and boilers 

defined as, in percent: 

Where: 

EF = average annual fuel consumption as 

defined in 10.4.2 of this appendix. 

EAE = as defined in 10.4.3 of this appendix. 

EffyHS = Annual Fuel Utilization Efficiency 

as defined in 11.2.11, 11.3.11, 11.4.11 or 

11.5.11 of ANSI/ASHRAE Standard 103– 

1993, in percent, and calculated on the 

basis of: 

ICS installation, for non-weatherized warm 

air furnaces; 

indoor installation, for non-weatherized 

boilers; or 

outdoor installation, for furnaces and 

boilers that are weatherized. 

3,412 = conversion factor from kilowatt to 

Btu/h 

10.6.2 Energy factor for electric furnaces 

and boilers. The energy factor, EF, for electric 

furnaces and boilers is defined as: 

EF = AFUE 

Where: 

AFUE = Annual Fuel Utilization Efficiency 

as defined in section 10.5 of this 

appendix, in percent 

10.7 Average annual energy consumption 

for furnaces and boilers located in a different 

geographic region of the United States and in 

buildings with different design heating 

requirements. 

10.7.1 Average annual fuel energy 

consumption for gas or oil-fueled furnaces 

and boilers located in a different geographic 

region of the United States and in buildings 

with different design heating requirements. 

For gas or oil-fueled furnaces and boilers, the 

average annual fuel energy consumption for 

a specific geographic region and a specific 

typical design heating requirement (EFR) is 

expressed in Btu per year and defined as: 

EFR = (EF ¥8,760 QP)(HLH/2,080) + 8,760 QP

Where: 

EF = as defined in 10.4.2 of this appendix 

8,760 = as specified in 10.4.1.1 of this 

appendix 

QP = as defined in 11.2.11 of ANSI/ASHRAE 

Standard 103–1993 

HLH = heating load hours for a specific 

geographic region determined from the 

heating load hour map in Figure 1 of this 

appendix 

2,080 = as defined in 10.4.1 of this appendix 

10.7.2 Average annual auxiliary electrical 

energy consumption for gas or oil-fueled 

furnaces and boilers located in a different 

geographic region of the United States and in 

buildings with different design heating 

requirements. For gas or oil-fueled furnaces 

and boilers, the average annual auxiliary 

electrical energy consumption for a specific 

geographic region and a specific typical 

design heating requirement (EAER) is 

expressed in kilowatt-hours and defined as: 

EAER = (EAE ¥ ESO) (HLH/2080) + ESOR

Where: 

EAE = as defined in 10.4.3 of this appendix 

ESO = as defined in 10.11 of this appendix 

HLH = as defined in 10.7.1 of this appendix 

2,080 = as specified in 10.4.1 of this 

appendix 

ESOR = as specified in 10.7.3 of this appendix. 

10.7.3 Average annual electric energy 

consumption for electric furnaces and boilers 

located in a different geographic region of the 

United States and in buildings with different 

design heating requirements. For electric 

furnaces and boilers, the average annual 

electric energy consumption for a specific 

geographic region and a specific typical 

design heating requirement (EER) is expressed 

in kilowatt-hours and defined as: 

EER = 100(0.77) DHR HLH/(3.412 AFUE) + 

ESOR

Where: 

100 = as specified in 10.5 of this appendix 

0.77 = as specified in 10.4.1 of this appendix 

DHR = as defined in 10.4.1 of this appendix 

HLH = as defined in 10.7.1 of this appendix 

3.412 = as specified in 10.5 of this appendix 

AFUE = as defined in 10.5 of this appendix 

ESOR = ESO as defined in 10.11 of this 

appendix, except that in the equation for 

ESO, the term BOH is multiplied by the 

expression (HLH/2080) to get the 

appropriate regional accounting of 

standby mode and off mode loss. 

10.8 Annual energy consumption for 

mobile home furnaces. 

10.8.1 National average number of burner 

operating hours for mobile home furnaces 

(BOHSS). BOHSS is the same as in 10.4.1 of 

this appendix, except that the value of EffyHS

in the calculation of the burner operating 

hours, BOHSS, is calculated on the basis of a 

direct vent unit with system number 9 or 10. 

10.8.2 Average annual fuel energy for 

mobile home furnaces (EF). EF is same as in 

10.4.2 of this appendix except that the burner 

operating hours, BOHSS, is calculated as 

specified in 10.8.1 of this appendix. 

10.8.3 Average annual auxiliary electrical 

energy consumption for mobile home 

furnaces (EAE). EAE is the same as in 10.4.3 

of this appendix, except that the burner 

operating hours, BOHSS, is calculated as 

specified in 10.8.1 of this appendix. 

10.9 Calculation of sales weighted 

average annual energy consumption for 

mobile home furnaces. In order to reflect the 

distribution of mobile homes to geographical 

regions with average HLHMHF value different 

from 2,080, adjust the annual fossil fuel and 

auxiliary electrical energy consumption 

values for mobile home furnaces using the 

following adjustment calculations. 

10.9.1 For mobile home furnaces, the 

sales weighted average annual fossil fuel 

energy consumption is expressed in Btu per 

year and defined as: 

EF,MHF = (EF ¥ 8,760 QP)HLHMHF/ 

2,080+8,760 QP

Where: 

EF = as defined in 10.8.2 of this appendix 

8,760 = as specified in 10.4.1.1 of this 

appendix 

QP = as defined in 11.2.11 of ANSI/ASHRAE 

Standard 103–1993 

HLHMHF = 1880, sales weighted average 

heating load hours for mobile home 

furnaces 

2,080 = as specified in 10.4.1 of this 

appendix 

10.9.2 For mobile home furnaces, the 

sales weighted average annual auxiliary 

electrical energy consumption is expressed in 

kilowatt-hours and defined as: 

EAE,MHF = EAE HLHMHF/2,080 

Where: 

EAE = as defined in 10.8.3 of this appendix 

HLHMHF = as defined in 10.9.1 of this 

appendix 

2,080 = as specified in 10.4.1 of this 

appendix 

10.10 Direct determination of off-cycle 

losses for furnaces and boilers equipped with 

thermal stack dampers. [Reserved.] 


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53630 Federal Register / Vol. 78, No. 169 / Friday, August 30, 2013 / Rules and Regulations 

10.11 Average annual electrical standby 

mode and off mode energy consumption. 

Calculate the annual electrical standby mode 

and off mode energy consumption (ESO) in 

kilowatt-hours, defined as: 

ESO = ((PW,SB * (4160 ¥ BOH)) + (PW,OFF * 

4600)) * K 

Where: 

PW,SB = furnace or boiler standby mode 

power, in watts, as measured in section 

8.6 of this appendix 

4,160 = average heating season hours per year 

PW,OFF = furnace or boiler off mode power, 

in watts, as measured in section 8.6 of 

this appendix 

4,600 = average non-heating season hours per 

year 

K = 0.001 kWh/Wh, conversion factor for 

watt-hours to kilowatt-hours 

BOH = total burner operating hours as 

calculated in section 10.4 for gas or oilfueled furnaces or boilers. Where for gas 

or oil-fueled furnaces and boilers 

equipped with single-stage controls, 

BOH = BOHSS ; for gas or oil-fueled 

furnaces and boilers equipped with twostage controls, BOH = (BOHR + BOHH); 

and for gas or oil-fueled furnaces and 

boilers equipped with step-modulating 

controls, BOH = (BOHR + BOHM). For 

electric furnaces and boilers, BOH = 

100(2080)(0.77)DHR/(Ein 3.412)(AFUE)) 

Where: 

100 = to express a percent as a decimal 

2,080 = as specified in 10.4.1 of this 

appendix 

0.77 = as specified in 10.4.1 of this appendix 

DHR = as defined in 10.4.1 of this appendix 

3.412 = conversion to express energy in terms 

of KBtu instead of kilowatt-hours 

AFUE = as defined in 11.1 of ANSI/ASHRAE 

Standard 103–1993 (incorporated by 

reference, see § 430.3) in percent 

Ein = Steady-state electric rated power, in 

kilowatts, from section 9.3 of ANSI/ 

ASHRAE Standard 103–1993 

(incorporated by reference, see § 430.3). 

[FR Doc. 2013–21095 Filed 8–29–13; 8:45 am] 

BILLING CODE 6450–01–P 

DEPARTMENT OF TRANSPORTATION 

Federal Aviation Administration 

14 CFR Part 39 

[Docket No. FAA–2013–0450; Directorate 

Identifier 2013–CE–010–AD; Amendment 

39–17543; AD 2013–16–05] 

RIN 2120–AA64 

Airworthiness Directives; Alexander 

Schleicher GmbH & Co. 

Segelflugzeugbau Sailplanes 

AGENCY: Federal Aviation 

Administration (FAA), Department of 

Transportation (DOT). 

ACTION: Final rule. 

SUMMARY: We are superseding an 

existing airworthiness directive (AD) for 

all Alexander Schleicher GmbH & Co. 

Segelflugzeugbau Models AS –K13, 

Ka2B, Ka 6, Ka 6 B, Ka 6 BR, Ka 6 C, 

Ka 6 CR, K7, K8, and K 8 B sailplanes. 

This AD results from mandatory 

continuing airworthiness information 

(MCAI) issued by an aviation authority 


ehiers on DSK2VPTVN1PROD with RULESER30AU13.003</GPH>