APPENDIX L. DETERMINATION OF FURNACE AND BOILER ENERGY USE IN

THE LCC ANALYSIS

TABLE OF CONTENTS

L.1 INTRODUCTION .................................................... L-2

L.2 CALCULATIONS ..................................................... L-2

L.2.1 Determination of Average Annual Fuel Energy Consumption (EF) ......... L-2

L.2.2 Determination of Average Annual Electrical Energy Consumption (EAE) .... L-3

L.2.3 Determination of National Average Number of Burner Operating Hours

(BOHss) ....................................................... L-5

L.3 SUMMARY TABLES .................................................. L-8

LIST OF TABLES

Table L.3.1 Energy Use Parameters for Non-Weartherized Gas Furnaces ............. L-8

Table L.3.2 Energy Use Parameters for Weartherized Gas Furnaces .................. L-8

Table L.3.3 Energy Use Parameters for Mobile Home Gas Furnaces ................. L-8

Table L.3.4 Energy Use Parameters for Oil-Fired Furnaces ......................... L-9

Table L.3.5 Energy Use Parameters for Hot-Water Gas Boilers ..................... L-9

Table L.3.6 Energy Use Parameters for Hot-Water Oil Boilers ..................... L-10

 EE-RM/STD-01-350 COMMENT 164

APPENDIX L. DETERMINATION OF FURNACE AND BOILER ENERGY USE IN 

THE LCC ANALYSIS 

TABLE OF CONTENTS 

L.l INTRODUCTION .................................................... L-2 

L.2 CALCULATIONS ..................................................... L-2 

L.2.1 Determination of Average Annual Fuel Energy Consumption (EF) ••••••••• L-2 

L.2.2 Determination of Average Annual Electrical Energy Consumption (EAE) •..• L-3 

L.2.3 Determination of National Average Number of Burner Operating Hours 

(BOHss) ....................................................... L-5 

L.3 SUMMARY TABLES .................................................. L-8 

Table L.3.1 

Table L.3.2 

Table L.3.3 

Table L.3.4 

Table L.3.5 

Table L.3.6 

LIST OF TABLES 

Energy Use Parameters for Non-Weartherized Gas Furnaces ............. L-8 

Energy Use Parameters for Weartherized Gas Furnaces .................. L-8 

Energy Use Parameters for Mobile Horne Gas Furnaces ................. L-8 

Energy Use Parameters for Oil-Fired Furnaces ......................... L-9 

Energy Use Parameters for Hot-Water Gas Boilers ..................... L-9 

Energy Use Parameters for Hot-Water Oil Boilers ..................... L-IO 

L-i 
APPENDIX L. DETERMINATION OF FURNACE AND BOILER ENERGY USE IN

THE LCC ANALYSIS

L.1 INTRODUCTION

The energy consumption in the LCC analysis is determined using the proposed

BSR/ASHRAE SPC 103R "Method of Testing for Annual Fuel Efficiency of Residential Central

Furnaces and Boilers".' Department of Energy used this test procedure instead of the current

DOE test procedure , because of the anomaly with the DHR parameter as described in Appendix

D section D.2.3. This approach requires the calculation of the average annual fuel energy

consumption (EF), the average annual electrical energy consumption (EAE), and the national

average number of burner operating hours (BOH) of furnaces and boilers.

The following calculations and summary tables describe the determination of EF, EAE, and

BOH for gas- and oil-fired furnaces and boilers.

L.2 CALCULATIONS

L.2.1 Determination of Average Annual Fuel Energy Consumption (EF)

The average annual fuel consumption is calculated in Appendix C section 2 of the

BSR/ASHRAE 103/1993R test procedure:'

EF = BOHss * (QIN - Qp) + 8,760 * Q, , for single-stage furnaces and boilers, Eq. 1

EF = (BOHH * QIN) + (BOHR * QINR) + [8,760 - (BOHH + BOHR)] * Qp, for two-stage

furnaces and boilers, and Eq. 2

EF = (BOHM * QINM) + (BOHR * QINR)+ [8,760 - (BOHM + BOHR )] * Qp, for continuous

modulatinga furnaces and boilers Eq. 3

where,

BOHss = national average number of burner operating hours (see derivation in section

L.2.3),

BOHH = national average number of burner operating hours at the maximum operating

mode for two-stage furnaces and boilers (see derivation in section L.2.3),

BOHR = national average number of burner operating hours at the reduced operating mode

a In this Technical Support Documentation , "continuous modulating" term is used instead of"step-modulating". Both

terns are interchangeable used in the literature.

L-2

 EE-RM/STD-01-350 COMMENT 164

APPENDIX L. DETERMINATION OF FURNACE AND BOILER ENERGY USE IN 

THE LCC ANALYSIS 

L.l INTRODUCTION 

The energy consumption in the LCC analysis is determined using the proposed 

BSRlASHRAE SPC 103R "Method of Testing for Annual Fuel Efficiency of Residential Central 

Furnaces and Boilers". I Department of Energy used this test procedure instead of the current 

DOE test procedure, because of the anomaly with the DHR parameter as described in Appendix 

D section D.2.3. This approach requires the calculation of the average annual fuel energy 

consumption (EF)' the average annual electrical energy consumption (EAE)' and the national 

average number of burner operating hours (BOH) of furnaces and boilers. 

The following calculations and summary tables describe the determination of EF, EAE, and 

BOH for gas- and oil-fired furnaces and boilers. 

L.2 CALCULATIONS 

L.2.1 Determination of Average Annual Fuel Energy Consumption (EF) 

The average annual fuel consumption is calculated in Appendix C section 2 of the 

BSRlASHRAE 10311993R test procedure: I 

EF = BOHss * (QfN - Qp) + 8,760 * Qp, for single-stage furnaces and boilers, Eq.l 

EF = (BOHH * QfN) + (BOHR * QfN,R) + [8,760 - (BOHH + BOHR)]* Qp, for two-stage 

furnaces and boilers, and Eq.2 

EF = (BOHM* QIN,M) + (BOHR * QfN,R)+ [8,760 - (BOHM+ BOHR)]* Qp, for continuous 

modulatinga furnaces and boilers Eq.3 

where, 

BOHss = national average number of burner operating hours (see derivation in section 

L.2.3), 

national average number of burner operating hours at the maximum operating 

mode for two-stage furnaces and boilers (see derivation in section L.2.3), 

national average number of burner operating hours at the reduced operating mode 

a In this Technical Support Documentation, "continuous modulating" tenn is used instead of "step-modulating". Both 

tenns are interchangeable used in the literature. 

L-2 
for two-stage or continuous modulating furnaces and boilers (see derivation in

section L.2.3),

BOHM = national average number of burner operating hours at the modulating operating

mode for continuous modulating furnaces and boilers (see derivation in section

L.2.3),

Q!N = steady-state nameplate input rate in Btu/h for single-stage furnaces and boilers or

steady-state nameplate maximum input rate in Btu/h for two-stage and continuous

modulating furnaces and boilers,

QIN,R = steady-state reduced fuel input rate,

QIN,M = steady-state modulating fuel input rate, and

QP = pilot flame fuel input rate in Btu/h.

QI,,, is based on the baseline value for each product class. We set QR,,,R to be 69% of QI,,,

for non-condensing two-stage equipment, 67% for condensing two-stage equipment, and 40%

for continuous modulation equipment, where this value represents the average ratio QIN/QIN;R as

derived using manufacturer product literature and Gas Appliance Manufacturers Association

(GAMA) March 2005 Directory data for all listed two-stage furnace models.2

From Appendix C Section I,' QIN,M is calculated using QOUT,M and Effyss,M (as defined in

section 11.4.8.10 or 11 . 5.8.8).' Q,, is zero for all product classes, except for the baseline

manufactured-home gas furnace and gas boiler.

L.2.2 Determination of Average Annual Electrical Energy Consumption (EAE)

Using the BSRIASHRAE SPC 103/1993R test procedure,' the average annual auxiliary

electrical energy consumption is calculated in Appendix C section 3:

EAE = BOHss (yp * PE + YIG *PEIG + y * BE), for single-stage furnaces and boilers,Eq. 4

and

EAE = BOHR (YP.R *PER + YJG.R *PEJGR + YR *BER) + BOHH M (YP *PEH + YzG *PEEGH +

y*Bf )a, for two-stage and continuous modulating furnaces and boilers, Eq. 5

where

BOHss = as defined in section L.2.3,

BOHH = as defined in section L.2.3,

BOHM,I = as defined in section L.2.3,

BOHR = as defined in section L.2.3,

° The BSR/ASHRAE test procedure does not deal with ignitor energy consumption. The ratio of ignitor on-time to

burner on-time and the ignitor power consumption variables come from the DOE test procedure.3

L-3

 EE-RM/STD-01-350 COMMENT 164

for two-stage or continuous modulating furnaces and boilers (see derivation in 

section L.2.3), 

national average number of burner operating hours at the modulating operating 

mode for continuous modulating furnaces and boilers (see derivation in section 

L.2.3), 

steady-state nameplate input rate in Btu/h for single-stage furnaces and boilers or 

steady-state nameplate maximum input rate in Btu/h for two-stage and continuous 

modulating furnaces and boilers, 

steady-state reduced fuel input rate, 

steady-state modulating fuel input rate, and 

pilot flame fuel input rate in Btu/h. 

QIN is based on the baseline value for each product class. We set QIN R to be 69% of QIN 

for non-condensing two-stage equipment, 67% for condensing two-stage equipment, and 40% 

for continuous modulation equipment, where this value represents the average ratio QIN/QIN,R as 

derived using manufacturer product literature and Gas Appliance Manufacturers Association 

(GAMA) March 2005 Directory data for all listed two-stage furnace models. 2 

From Appendix C Section 1,1 QIN,M is calculated using QOUT,M and Effyss,M (as defined in 

section 11.4.8.10 or 11.5.8.8).1 Qp is zero for all product classes, except for the baseline 

manufactured-home gas furnace and gas boiler. 

L.2.2 Determination of Average Annual Electrical Energy Consumption (EAE) 

Using the BSRJASHRAE SPC 10311993R test procedure,I the average annual auxiliary 

electrical energy consumption is calculated in Appendix C section 3: 

and 

where 

BOHss 

BOHH 

BOHM 

BOHR 

EAE = BOHss (Yp * PE + Y/G *PE/G + Y * BE), for single-stage furnaces and boilers,Eq. 4 

EAE = BOHR (YP,R *PER + Y/G,R *PE/G,R + YR *BE,J + BOHHarM (yp*PEH + Y/G *PE/G,H + 

y*BEJa, for two-stage and continuous modulating furnaces and boilers, Eq.5 

as defined in section L.2.3, 

as defined in section L.2.3, 

as defined in section L.2.3, 

as defined in section L.2.3, 

a The BSRJASHRAE test procedure does not deal with ignitor energy consumption, The ratio of ignitor on-time to 

burner on-time and the ignitor power consumption variables come from the DOE test procedure.3 

L-3 
yP = ratio of induced or forced draft blower on-time to average burner on-time,

YP,R = ratio of induced or forced draft blower on-time to average burner on-time,

measured at the reduced fuel input rate,

PE = burner (or draft inducer) electrical power input at full-load steady -state operation

in kW,

PER = burner (or draft inducer) electrical power input at full-load steady-state operation

in kW, measured at the reduced fuel input rate,

PEH = burner (or draft inducer) electrical power input at full-load steady-state operation

in kW, measured at the maximum fuel input rate,

YIG = ratio of burner interrupted-ignition device on-time to average burner on-time,

YIG,R = ratio of burner interrupted-ignition device on-time to average burner on-time,

measured at the reduced fuel input rate,

PEIG = electrical input rate to the interrupted ignition device on the burner,

PEIG R = electrical input rate to the interrupted ignition device on the burner, measured at

the reduced fuel input rate,

PEIG,H = electrical input rate to the interrupted ignition device on the burner, measured at

the maximum fuel input rate,

y = ratio of blower or pump on-time to burner on-time,

YR = ratio of blower or pump on-time to burner on-time, measured at the reduced fuel

input rate,

BE = circulating-air fan or water pump electrical energy input rate in kW,

BER = circulating-air fan or water pump electrical energy input rate in kW , measured at

the reduced fuel input rate, and

BEH = circulating-air fan or water pump electrical energy input rate in kW , measured at

the maximum fuel input rate.

The values yp and y,,R are calculated using t, (post-purge time). For this calculation, DOE

took tp to be 5 seconds for furnaces, which is less than or 30 seconds and is therefore set equal to

0 seconds, according to Appendix C section 1 of the BSR/ASHRAE SPC 103/ 1993R test

procedure .' For gas furnaces, t, is equal to 3 minutes . For boilers, DOE calculated the values YIG

and YIG,R using tIG (burner interrupted -ignition device on-time). For gas furnaces and boilers, tIG =

0.62 min.' For oil boilers, tIG is equal to 26 minutes for oil equipment without interrupted

ignition and 45 seconds with oil equipment with interrupted ignitions DOE calculated the values

y and YP,R using t+ (blower or pump on-delay) and r (blower or pump off-delay). For furnaces, t+

= 2 min and t- = 0.5 min, and for gas and oil boilers, t + = 15 minutes and t- = 0, which are values

obtained for the generic furnace models (see Chapter 7 Section 7.2.6). For gas furnaces, PE is

equal to 75 W for non-condensing furnaces and 90 W for condensing furnaces (see Chapter 7

Section 7 .2.6). For oil furnaces and boilers, PE is set to 220 W. 6 For gas boilers, PE is equal to

76 W using typical values from the March 2005 GAMA Directory.2 For design options which

include modulating controls, we set PER and PEH to have the same values as PE, since it is

assumed that there is no inducer modulation. For gas furnaces and boilers, PEIG , PEIG,R, and

PEIG,H are set equal to 400 W.7 For oil furnaces and boilers, PEIG is equal to 45 watts for oil

equipment without interrupted ignition and 25 watts with oil equipment with interrupted

ignition.' For design options which include modulating controls, we set PEJG ,R and PEIG,H to have

L-4

 EE-RM/STD-01-350 COMMENT 164

PE 

YIG 

YIG,R 

Y 

YR 

ratio of induced or forced draft blower on-time to average burner on-time, 

ratio of induced or forced draft blower on-time to average burner on-time, 

measured at the reduced fuel input rate, 

burner (or draft inducer) electrical power input at full-load steady-state operation 

inkW, 

burner (or draft inducer) electrical power input at full-load steady-state operation 

in kW, measured at the reduced fuel input rate, 

burner (or draft inducer) electrical power input at full-load steady-state operation 

in kW, measured at the maximum fuel input rate, 

ratio of burner interrupted-ignition device on-time to average burner on-time, 

ratio of burner interrupted-ignition device on-time to average burner on-time, 

measured at the reduced fuel input rate, 

electrical input rate to the interrupted ignition device on the burner, 

electrical input rate to the interrupted ignition device on the burner, measured at 

the reduced fuel input rate, 

electrical input rate to the interrupted ignition device on the burner, measured at 

the maximum fuel input rate, 

ratio of blower or pump on-time to burner on-time, 

ratio of blower or pump on-time to burner on-time, measured at the reduced fuel 

input rate, 

circulating-air fan or water pump electrical energy input rate in kW, 

circulating-air fan or water pump electrical energy input rate in kW, measured at 

the reduced fuel input rate, and 

circulating-air fan or water pump electrical energy input rate in kW, measured at 

the maximum fuel input rate. 

The values yp and YP,R are calculated using tp (post-purge time). For this calculation, DOE 

took tp to be 5 seconds for furnaces, which is less than or 30 seconds and is therefore set equal to 

o seconds, according to Appendix C section 1 of the BSRlASHRAE SPC 10311993R test 

procedure. l For gas furnaces, tp is equal to 3 minutes. For boilers, DOE calculated the values YIG 

and YrOR using tro (burner interrupted-ignition device on-time). For gas furnaces and boilers, tro = 

0.62 min. 4 For oil boilers, tro is equal to 26 minutes for oil equipment without interrupted 

ignition and 45 seconds with oil equipment with interrupted ignition. 5 DOE calculated the values 

Y and YPR using t (blower or pump on-delay) and r (blower or pump off-delay). For furnaces, t 

= 2 min 'and r = 0.5 min, and for gas and oil boilers, t+ = 15 minutes and r = 0, which are values 

obtained for the generic furnace models (see Chapter 7 Section 7.2.6). For gas furnaces, PE is 

equal to 75 W for non-condensing furnaces and 90 W for condensing furnaces (see Chapter 7 

Section 7.2.6). For oil furnaces and boilers, PE is set to 220 W. 6 For gas boilers, PE is equal to 

76 W using typical values from the March 2005 GAMA Directory.2 For design options which 

include modulating controls, we set PER and PEH to have the same values as PE, since it is 

assumed that there is no inducer modulation. For gas furnaces and boilers, PEro, PEroR, and 

PEro,H are set equal to 400 W.7 For oil furnaces and boilers, PEIG is equal to 45 watts for oil 

equipment without interrupted ignition and 25 watts with oil equipment with interrupted 

ignition.s For design options which include modulating controls, we set PEro,R and PEIG,H to have 

L-4 
the same values as PEIG, since it is assumed that there is no ignition modulation . For furnaces, BE

and BER values are calculated using equations in Appendix J for the different design options. For

boilers, BEH and BE are set equal to 70 W, while BER is set 80% of BEH (56 W).9

L.2.3 Determination of National Average Number of Burner Operating Hours (BOHss)

From the BSR/ASHRAE SPC103R test procedure,' the national average number of burner

operating hours for furnaces and boilers is calculated in Appendix C section 1:

BOHSS = 2080 * 0.77 * A * (QouT / (1 + a)) - 2080 * B, for single-stage furnaces and

boilers, Eq. 6

BOHH = XH * (2080) * (0.77) * AH * (QouT / (1 + a)) - 2080 * BH, for two-stage furnaces

and boilers at the maximum operating mode, Eq. 7

BOHR =XR * (2080) * (0.77) * AR * (QouT I ( 1 + a)) - 2080 * BR, for two-stage and

continuous modulating furnaces and boilers operating at the reduced

operating mode, Eq. 8

and

where

BOHM=XH * (2080) * (0.77) * AM * (QouT/ ( 1 + a)) - 2080 * BM, for continuous

modulating furnaces and boilers operating at the modulating operating mode, Eq. 9

2080 = national average heating load hours,

0.77 = adjustment factor to adjust the calculated design heating requirements and heating load

hours to the actual heating load experienced by the heating system,

A = 100,000/ [341300(yp * PE +YIG,R *PEIGR + Y * BE) + (QrN - Qp) * EffyHS]a,

AH = 100,000/ [341300(yp * PEH + Y,c,R *PEIG R + y * BEH) + (QI, - Qp) * E ffyu,H]a,

AR = 100,000/ [341300(YP,R * PER +YIG,R *PEIGR + YR * BER) + (QrN,R - Qp) * Effyu,R]a,

AM = 100,000/ [341300(yp * PEH +YIG,R *PEIGR +Y * BEH) + (QIN,M - Qp) * EffyU,M]a,

B =

BH =

BR =

BM =

2 * (Q p) * (EffyHs) * (A) / 100,000,

2 * (Qp) * (EffyU,H) * (AH) / 100,000,

2 * (Qp) * (EffYU,R) * (AR) / 100,000,

2 * (Qp) * (EffyU,M) * (AM) / 100,000,

QOUT = maximum fuel input rate heating capacity,

a = oversize factor,

a The BSR/ASHRAE test procedure does not deal with ignitor energy consumption. The ratio of ignitor on-time to

burner on-time and the ignitor power consumption variables come from the DOE test procedure?

L-5

 EE-RM/STD-01-350 COMMENT 164

the same values as PE1G, since it is assumed that there is no ignition modulation. For furnaces, BE 

and BER values are calculated using equations in Appendix J for the different design options. For 

boilers, BEH and BE are set equal to 70 W, while BER is set 80% ofBEH (56 W).9 

L.2.3 Determination of National Average Number of Burner Operating Hours (BOHss) 

From the BSRlASHRAE SPC103R test procedure,1 the national average number of burner 

operating hours for furnaces and boilers is calculated in Appendix C section 1: 

and 

where 

BOHss = 2080 * 0.77 * A * (QOUT 1(1 + a» -2080 * B, for single-stage furnaces and 

boilers, Eq. 6 

BOHH= XH * (2080) * (0.77) * AH * (QouTI (1 + a» -2080 * BH, for two-stage furnaces 

and boilers at the maximum operating mode, Eq.7 

BOHR = XR * (2080) * (0.77) * AR * (QOUT 1(1 + a» -2080 * B R' for two-stage and 

continuous modulating furnaces and boilers operating at the reduced 

operating mode, Eq.8 

BOHM=XH * (2080) * (0.77) * AM * (QouTI (1 + a» -2080 * BM, for continuous 

modulating furnaces and boilers operating at the modulating operating mode, Eq.9 

2080 national average heating load hours, 

0.77 adjustment factor to adjust the calculated design heating requirements and heating load 

hours to the actual heating load experienced by the heating system, 

A 100,0001 [341300(yp * PE + Y/G,R *PE/G,R + Y * BE) + (QIN - Qp) * EffyHs]a, 

AH 100,0001 [341300(yp * PEH + YIG,R *PE/G,R + Y * BEH) + (QIN - Qp) * Effyu,H)", 

AR 100,0001 [341300(Yp,R * PER + Y/G,R *PE/G,R + YR * BEJ + (QIN,R - Qp) * Effyu,R]a, 

AM 100,0001 [341300(yp * PEH + Y/G,R *PE/G,R + Y * BEH) + (QIN,M - Qp) * Effyu,M]", 

B 2 * (Qp) * (EffyHs) * (A) 1100,000, 

BH 2 * (Qp) * (Effyu,H) * (AH) I 100,000, 

BR 2 * (Qp) * (Effyu,R) * (AR) 1100,000, 

BM 2 * (Qp) * (EffyuM) * (AM) 1100,000, 

QOUT maximum fuel input rate heating capacity, 

a oversize factor, 

a The BSRJ ASHRAE test procedure does not deal with ignitor energy consumption. The ratio of ignitor on-time to 

burner on-time and the ignitor power consumption variables come from the DOE test procedure.3 

L-5 
Xt, = fraction of heating load at maximum fuel input rate operating mode,

XR = fraction of heating load at reduced fuel input rate operating mode (l-XH),

QIN = as defined in section L.2.1 of this appendix,

QIN,R = as defined in section L.2.1 of this appendix,

QIN,M = as defined in section L.2.1 of this appendix,

QP = as defined in section L.2.1 of this appendix,

yP = as defined in section L.2.2 of this appendix,

YP,R = as defined in section L.2.2 of this appendix,

PE = as defined in section L.2.2 of this appendix,

PER = as defined in section L.2.2 of this appendix,

PEH = as defined in section L.2.2 of this appendix,

Yrc = as defined in section L.2.2 of this appendix,

YIG,R = as defined in section L.2.2 of this appendix,

PEIG = as defined in section L. 2.2 of this appendix,

PE,G,R = as defined in section L.2.2 of this appendix,

PE,G,H = as defined in section L.2.2 of this appendix,

y = as defined in section L.2.2 of this appendix,

YR = as defined in section L.2.2 of this appendix,

BE = as defined in section L.2.2 of this appendix,

BER = as defined in section L. 2.2 of this appendix,

BEH = as defined in section L.2.2 of this appendix,

EffyHs = ratio of the average length of the heating season in hours to the average heating load

hours,

EffyUH = average part load efficiency at the maximum fuel input rate,

EffyUR = average part load efficiency at the reduced fuel input rate, and

EffyUM = average part load efficiency at the modulating fuel input rate.

Equations 6 through 9 are modified to account for the fact that we know the house heating

load (HHL) for each RECS household (see Chapter 7 section 7.6). First we set HHL equal to the

factors in equations 6 through 9 used to approximate HHL:

HHL=2080*0.77*(QoUTI(1+a))

Therefore a is set equal to:

a= QOuT * (2080) * (0.77) / (HHL) - 1

Eq. 10

Eq. 11

instead of being equal to the constant value 0.7 as defined in the BSR /ASHRAE SPC103/1993R

test procedure.'

The modified equations used in the LCC spreadsheet are as follows (Note that the

maximum value for BOH is set to 8760):

BOHss = A * HHL - 2080 * B, for single-stage furnaces and boilers, Eq. 12

L-6

 EE-RM/STD-01-350 COMMENT 164

XH 

XR 

QIN 

QIN,R 

QIN,M 

Qp 

YP 

YP,R 

PE 

PER 

PEH 

YIG 

YIG,R 

PEIG 

PEIG,R 

PEIG,H 

Y 

YR 

BE 

fraction of heating load at maximum fuel input rate operating mode, 

fraction of heating load at reduced fuel input rate operating mode (l-XH), 

as defined in section L.2.1 of this appendix, 

as defined in section L.2.1 of this appendix, 

as defined in section L.2.1 of this appendix, 

as defined in section L.2.1 of this appendix, 

as defined in section L.2.2 of this appendix, 

as defined in section L.2.2 of this appendix, 

as defined in section L.2.2 of this appendix, 

as defined in section L.2.2 of this appendix, 

as defined in section L.2.2 of this appendix, 

as defined in section L.2.2 of this appendix, 

as defined in section L.2.2 of this appendix, 

as defined in section L.2.2 of this appendix, 

as defined in section L.2.2 of this appendix, 

as defined in section L.2.2 of this appendix, 

as defined in section L.2.2 of this appendix, 

as defined in section L.2.2 of this appendix, 

as defined in section L.2.2 of this appendix, 

as defined in section L.2.2 of this appendix, 

as defined in section L.2.2 of this appendix, 

BER 

BEH 

EffyHS ratio of the average length of the heating season in hours to the average heating load 

hours, 

EffyU,H = 

EffyU,R = 

EffyU,M= 

average part load efficiency at the maximum fuel input rate, 

average part load efficiency at the reduced fuel input rate, and 

average part load efficiency at the modulating fuel input rate. 

Equations 6 through 9 are modified to account for the fact that we know the house heating 

load (HHL) for each RECS household (see Chapter 7 section 7.6). First we set HHL equal to the 

factors in equations 6 through 9 used to approximate HHL: 

HHL = 2080 * 0.77 * (QOUT1 (1 + a)) Eq.l0 

Therefore ais set equal to: 

a= QOUT * (2080) * (0.77) I (HHL) - I Eq.ll 

instead of being equal to the constant value 0.7 as defined in the BSRlASHRAE SPCI03/1993R 

test procedure. I 

The modified equations used in the LCC spreadsheet are as follows (Note that the 

maximum value for BOH is set to 8760): 

BOHss = A * HHL - 2080 * B, for single-stage furnaces and boilers, 

L-6 

Eq.12 
BOHH = XH * AH * HHL - 2080 * BH, for two-stage furnaces and boilers at the maximum

operating mode, Eq. 13

BOHR = XR * AR * HHL - 2080 * BR, for two-stage and continuous modulating furnaces

and boilers operating at the reduced operating mode, Eq. 14

and

BOHM = Xs * AM * HHL - 2080 * BM, for continuous modulating furnaces and boilers

operating at the modulating operating mode, Eq. 15

To calculate factors A, AH, AR, AM, B, BH, BR, and BM, DOE calculated yP, yP R, PE, PER,

PEN, YIG, YIG,R, PEIG, PEIG R, FEIGN, Y, YR, BE, BER, BEH, , PE, YIG, PEIG, y, BE, QIN, and Q P yP , as

described in section L.2.2 of this appendix. For factor B, if QP = 0, then B = 0, which is true for

all cases except for the baseline manufactured-home gas furnace and the baseline gas boiler. We

calculated EffyHs, heating seasonal efficiency, as defined in sections 11.2.11, 11.3.11.3, 11.4.11.3,

and 11.5.11 .3.' For QP = 0, EffyHs is equal to the annual fuel utilization efficiency (AFUE). For

QP > 0, Effy1S is calculated using EffyHs (as defined in section 11.2.8.1'). EffyHs is calculated using

QOUT (as defined below), K (factor that adjusts the jacket losses , where K = 1.7 for nonweatherized furnaces, 3.3 for weatherized furnaces, and 1 for boilers as described in section

11.2.8.1 1), and Lj (j acket loss, where Lj = 1 is the default value as described in section 11.2.8.1')

QOUT for all product classes is calculated using the following equations based on GAMA

Directory 2005 data for Non-Weatherized Gas Furnaces2:

QOUT = QIN (0.7247 * AFUE + 0.22346), for non-condensing equipment, and Eq. 16

QOUT = QIN (0.8127 * AFUE + 0.17557), for condensing equipment. Eq. 17

DOE calculated X. by using Tc (balance -point temperature as defined in section 11.4.8.4

a (the oversize factor, as calculated in Equation 11), QOUT, and QOUT,R (reduced fuel input rate

heating capacity). QOUTR is set equal to 69% QuUT for non-condensing equipment and 67% QOUT

for condensing equipment, as derived using manufacturer product literature and Gas Appliance

Manufacturers Association (GAMA) March 2005 Directory data for all listed two-stage furnace

models.2 XR is set equal to 1-XH. For similar reasons as provided in Appendix D, section D.3.2,

EffyHH = EffyUR and therefore using the equation in section 11.5.11.31 is equal to EffyHs. EffyUM is

calculated using the equation in section 11.4.9.2.3.'

L.3 SUMMARY TABLES

Tables L.4.1 through L.4.6 contain the data values used to calculate furnaces and boilers

energy use in the LCC Analysis.

L-7

 EE-RM/STD-01-350 COMMENT 164

BOHH = XH * AH * HHL - 20S0 * BH, for two-stage furnaces and boilers at the maximum 

operating mode, Eq.13 

BOHR = XR * A R * HHL - 20S0 * B R, for two-stage and continuous modulating furnaces 

and boilers operating at the reduced operating mode, Eq. 14 

and 

BOHM= XH * AM * HHL - 20S0 * BM, for continuous modulating furnaces and boilers 

operating at the modulating operating mode, Eq. 15 

To calculate factors A, AH, AR, AM, B, BH, BR, and BM, DOE calculatedYp,yPR' PE, PER' 

PEH, YIG' YIG,R, PEIG, PE1G,R' PEIG,H,Y,YR' BE, BER, BEH, , PE'YIG' PE1G,y, BE, QIN' and Qpyp, as 

described in section L.2.2 of this appendix. For factor B, if Qp = 0, then B = 0, which is true for 

all cases except for the baseline manufactured-home gas furnace and the baseline gas boiler. We 

calculated EffiHS' heating seasonal efficiency, as defined in sections 11.2.11, 11.3.11.3, 11.4.11.3, 

and 11.5.11.3. 1 For Qp = 0, EffiHS is equal to the annual fuel utilization efficiency (AFUE). For 

Qp> 0, EffiHS is calculated using Effiss (as defined in section 11.2.S.1 I). Effiss is calculated using 

QOUT (as defined below), K (factor that adjusts the jacket losses, where K = 1.7 for nonweatherized furnaces, 3.3 for weatherized furnaces, and 1 for boilers as described in section 

11.2.S.1 1), and Lj Gacket loss, where Lj = 1 is the default value as described in section 11.2.S.1 I

) 

QOUT for all product classes is calculated using the following equations based on GAMA 

Directory 2005 data for Non-Weatherized Gas Furnaces2

: 

QOUT = QIN (0.7247 * AFUE + 0.22346), for non-condensing equipment, and Eq.16 

QOUT = QIN (0.8127 * AFUE + 0.17557), for condensing equipment. Eq.17 

DOE calculated XH by using Tc (balance-point temperature as defined in section 11.4.8.4 

1), ex (the oversize factor, as calculated in Equation 11), QOUT' and QOUTR (reduced fuel input rate 

heating capacity). QOUTR is set equal to 69% QOUT for non-condensing equipment and 67% QOUT 

for condensing equipment, as derived using manufacturer product literature and Gas Appliance 

Manufacturers Association (GAMA) March 2005 Directory data for all listed two-stage furnace 

models. 2 XR is set equal to 1-XH . For similar reasons as provided in Appendix D, section D.3.2, 

Effiu,H = Effiu,R and therefore using the equation in section 11.5.11.31 is equal to Effiss. Effiu,M is 

calculated using the equation in section 11.4.9.2.3. 1 

L.3 SUMMARY TABLES 

Tables L.4.1 through L.4.6 contain the data values used to calculate furnaces and boilers 

energy use in the LCC Analysis. 

L-7 
Table L.3.1 Energy Use Parameters for Non-Weartherized Gas Furnaces

Description Effylls tp PE tIG PIG t+ t

78% AFUE - Baseline 78% 5 sec 75 37 sec 400 120 sec 30 sec

80% AFUE - Increased HX Area 80% 5 sec 75 37 sec 400 120 sec 30 sec

80% AFUE - Modulation (Two-Stage) 80% 5 sec 75 37 sec 400 120 sec 30 sec

81 % AFUE - Increased HX Area 81% 5 sec 75 37 sec 400 120 sec 30 sec

81% AFUE - Modulation (Two-Stage) 81% 5 sec 75 37 sec 400 120 sec 30 sec

90% AFUE - Condensing 90% 5 sec 90 37 sec 400 120 sec 30 sec

92% AFUE - Increased HX Area 92% 5 sec 90 37 sec 400 120 sec 30 sec

92% AFUE - Modulation (Two-Stage) 92% 5 sec 90 37 sec 400 120 sec 30 sec

92% AFUE - Modulation (Continuous) 92% 5 sec 90 37 sec 400 120 sec 30 sec

96% AFUE - Modulation (Continuous) 96% 5 sec 90 37 sec 400 120 sec 30 sec

Table L.3.2 Energy Use Parameters for Weartherized Gas Furnaces

Description EffyHS tp PE tic PIG t+ t78% AFUE - Baseline 78% 5 sec 75 37 sec 400 120 sec 30 sec

80% AFUE - Increased HX Area 80% 5 sec 75 37 sec 400 120 sec 30 sec

81% AFUE - Increased HX Area 81% 5 sec 75 37 sec 400 120 sec 30 sec

82% AFUE - Increased HX Area 82% 5 sec 75 37 sec 400 120 sec 30 sec

83% AFUE - Increased HX Area 83% 5 sec 75 37 sec 400 120 sec 30 sec

Table L.3.3 Energy Use Parameters for Mobile Home Gas Furnaces

Description EffyHS tp PE tic PIG t+ f

75% AFUE - Baseline 79% 5 sec 75 37 sec 0 120 sec 30 sec

80% AFUE - Increased HX Area 80% 5 sec 75 37 sec 400 120 sec 30 sec

80% AFUE - Modulation (Two-Stage) 80% 5 sec 75 37 sec 400 120 sec 30 sec

81% AFUE - Increased HX Area 81% 5 sec 75 37 sec 400 120 sec 30 sec

81% AFUE - Modulation (Two-Stage) 81% 5 sec 75 37 sec 400 120 sec 30 sec

82% AFUE - Increased HX Area 82% 5 sec 75 37 sec 400 120 sec 30 sec

82% AFUE - Modulation (Two-Stage) 82% 5 sec 75 37 sec 400 120 sec 30 sec

90% AFUE - Condensing 90% 5 sec 90 37 sec 400 120 sec 30 sec

 EE-RM/STD-01-350 COMMENT 164

T a e bi L 31 E · . nergy u se p arameters f or N W on- eart h enze dG as F urnaces 

Description EffYns tp PE tlG PIG t+ t78% AFUE - Baseline 78% 5 sec 75 37 sec 400 120 sec 30 sec 

80% AFUE - Increased HX Area 80% 5 sec 75 37 sec 400 120 sec 30 sec 

80% AFUE - Modulation (Two-Stage) 80% 5 sec 75 37 sec 400 120 sec 30 sec 

81 % AFUE - Increased HX Area 81% 5 sec 75 37 sec 400 120 sec 30 sec 

81 % AFUE - Modulation (Two-Stage) 81% 5 sec 75 37 sec 400 120 sec 30 sec 

90% AFUE - Condensing 90% 5 sec 90 37 sec 400 120 sec 30 sec 

92% AFUE - Increased HX Area 92% 5 sec 90 37 sec 400 120 sec 30 sec 

92% AFUE - Modulation (Two-Stage) 92% 5 sec 90 37 sec 400 120 sec 30 sec 

92% AFUE - Modulation (Continuous) 92% 5 sec 90 37 sec 400 120 sec 30 sec 

96% AFUE - Modulation (Continuous) 96% 5 sec 90 37 sec 400 120 sec 30 sec 

T a bi e L 32 E · . nergy u se p arameters f or W eart h enze dG as F urnaces 

Description EffYns tp PE tlG PIG t+ f 

78% AFUE - Baseline 78% 5 sec 75 37 sec 400 120 sec 30 sec 

80% AFUE - Increased HX Area 80% 5 sec 75 37 sec 400 120 sec 30 sec 

81 % AFUE - Increased HX Area 81% 5 sec 75 37 sec 400 120 sec 30 sec 

82% AFUE - Increased HX Area 82% 5 sec 75 37 sec 400 120 sec 30 sec 

83% AFUE - Increased HX Area 83% 5 sec 75 37 sec 400 120 sec 30 sec 

T a bi e L 33 E · . nergy u se p arame t ers f M or 0 b"l Ie H orne G F as urnaces 

Description EffYns tp PE tlG PIG t+ t75% AFUE - Baseline 79% 5 sec 75 37 sec 0 120 sec 30 sec 

80% AFUE - Increased HX Area 80% 5 sec 75 37 sec 400 120 sec 30 sec 

80% AFUE - Modulation (Two-Stage) 80% 5 sec 75 37 sec 400 120 sec 30 sec 

81 % AFUE - Increased HX Area 81% 5 sec 75 37 sec 400 120 sec 30 sec 

81 % AFUE - Modulation (Two-Stage) 81% 5 sec 75 37 sec 400 120 sec 30 sec 

82% AFUE - Increased HX Area 82% 5 sec 75 37 sec 400 120 sec 30 sec 

82% AFUE - Modulation (Two-Stage) 82% 5 sec 75 37 sec 400 120 sec 30 sec 

90% AFUE - Condensing 90% 5 sec 90 37 sec 400 120 sec 30 sec 

L-8 
Table L.3.4 Energy Use Parameters for Oil-Fired Furnaces

Description EffyHS t, PE t,G PIG t+ t78% AFUE - Baseline 78% 5 sec 220 26 min 45 120 sec 30 sec

80% AFUE - Increased HX Area 80% 5 sec 220 26 min 45 120 sec 30 sec

81% AFUE - Increased HX Area 81% 5 sec 220 26 min 45 120 sec 30 sec

81 % AFUE - Interrupted Ignition 81% 5 sec 220 45 sec 25 120 sec 30 sec

81% AFUE - Modulation (Two-Stage) 81% 5 sec 220 45 sec 25 120 sec 30 sec

82% AFUE - Increased HX Area 82% 5 sec 220 26 min 45 120 sec 30 sec

82% AFUE - Interrupted Ignition 82% 5 sec 220 45 sec 25 120 sec 30 sec

82% AFUE - Modulation (Two-Stage) 82% 5 sec 220 45 sec 25 120 sec 30 sec

83% AFUE - Increased HX Area 83% 5 sec 220 26 min 45 120 sec 30 sec

83% AFUE - Interrupted Ignition 83% 5 sec 220 45 sec 25 120 sec 30 sec

83% AFUE - Modulation (Two-Stage) 83% 5 sec 220 45 sec 25 120 sec 30 sec

84% AFUE - Increased HX Area 84% 5 sec 220 26 min 45 120 sec 30 sec

84% AFUE - Interrupted Ignition 84% 5 sec 220 45 sec 25 120 sec 30 sec

84% AFUE - Modulation (Two-Stage) 84% 5 sec 220 45 sec 25 120 sec 30 sec

85% AFUE - Increased HX Area 85% 5 sec 220 26 min 45 120 sec 30 sec

85% AFUE - Interrupted Ignition 85% 5 sec 220 45 sec 25 120 sec 30 sec

85% AFUE - Modulation (Two-Stage) 85% 5 sec 220 45 sec 25 120 sec 30 sec

Table L.3.5 Energy Use Parameters for Hot-Water Gas Boilers

Description EffyHS tp PE tIG PIG t+ t80% AFUE - Baseline 82% 180 sec 76 37 sec 0 15 min 0 sec

81% AFUE - Improved Heat Transfer Coe£ 81% 180 sec 76 37 sec 400 15 min 0 sec

81% AFUE - Modulation (Two-Stage) 81% 180 sec 76 37 sec 400 15 min 0 sec

82% AFUE - Improved Heat Transfer Coef. 82% 180 sec 76 37 sec 400 15 min 0 sec

82% AFUE - Modulation (Two-Stage) 82% 180 sec 76 37 sec 400 15 min 0 sec

83% AFUE - Improved Heat Transfer Coef. 83% 180 sec 76 37 sec 400 15 min 0 sec

83% AFUE - Modulation (Two-Stage) 83% 180 sec 76 37 sec 400 15 min 0 sec

84% AFUE - Improved Heat Transfer Coef 84% 180 sec 76 37 sec 400 15 min 0 sec

84% AFUE - Modulation (Two-Stage) 84% 180 sec 76 37 sec 400 15 min 0 sec

85% AFUE - Improved Heat Transfer Coef 85% 180 sec 76 37 sec 400 15 min 0 sec

85% AFUE - Modulation (Two-Stage) 85% 180 sec 76 37 sec 400 15 min 0 sec

86% AFUE 86% 180 sec 76 37 sec 400 15 min 0 sec

91%AFUE 91% 180 sec 76 37 sec 400 15 min 0 sec

99% AFUE 99% 180 sec 76 37 sec 400 15 min 0 sec

 EE-RM/STD-01-350 COMMENT 164

T a e bi L 3 4 E o 0 nergy u se p ~ 0 01 F O arameters or I - Ire d F urn aces 

Description EffYHS tp PE tlG PIG t+ t78% AFUE - Baseline 78% 5 sec 220 26 min 45 120 sec 30 sec 

80% AFUE - Increased HX Area 80% 5 sec 220 26 min 45 120 sec 30 sec 

81% AFUE Increased HX Area 81% 5 sec 220 26 min 45 120 sec 30 sec 

81 % AFUE - Interrupted Ignition 81% 5 sec 220 45 sec 25 120 sec 30 sec 

81 % AFUE - Modulation (Two-Stage) 81% 5 sec 220 45 sec 25 120 sec 30 sec 

82% AFUE - Increased HX Area 82% 5 sec 220 26 min 45 120 sec 30 sec 

82% AFUE - Interrupted Ignition 82% 5 sec 220 45 sec 25 120 sec 30 sec 

82% AFUE - Modulation (Two-Stage) 82% 5 sec 220 45 sec 25 120 sec 30 sec 

83% AFUE - Increased HX Area 83% 5 sec 220 26 min 45 120 sec 30 sec 

83% AFUE - Interrupted Ignition 83% 5 sec 220 45 sec 25 120 sec 30 sec 

83% AFUE - Modulation (Two-Stage) 83% 5 sec 220 45 sec 25 120 sec 30 sec 

84% AFUE - Increased HX Area 84% 5 sec 220 26 min 45 120 sec 30 sec 

84% AFUE - Interrupted Ignition 84% 5 sec 220 45 sec 25 120 sec 30 sec 

84% AFUE - Modulation (Two-Stage) 84% 5 sec 220 45 sec 25 120 sec 30 sec 

85% AFUE - Increased HX Area 85% 5 sec 220 26 min 45 120 sec 30 sec 

85% AFUE - Intemlpted Ignition 85% 5 sec 220 45 sec 25 120 sec 30 sec 

85% AFUE - Modulation (Two-Stage) 85% 5 sec 220 45 sec 25 120 sec 30 sec 

T a bi e L o 35 0 E nergy u se p arameters ~ or H W ot- ater G B as 01 01 ers 

Description EffYHS tp PE tlG PIG t+ t80% AFUE - Baseline 82% 180 sec 76 37 sec 0 15 min Osee 

81 % AFUE - Improved Heat Transfer Coef. 81% 180 sec 76 37 sec 400 15 min Osee 

81 % AFUE - Modulation (Two-Stage) 81% 180 sec 76 37 sec 400 15 min Osee 

82% AFUE - Improved Heat Transfer Coef. 82% 180 sec 76 37 sec 400 15 min Osee 

82% AFUE - Modulation (Two-Stage) 82% 180 sec 76 37 sec 400 15 min Osee 

83% AFUE - Improved Heat Transfer Coef. 83% 180 sec 76 37 sec 400 15 min Osee 

83% AFUE - Modulation (Two-Stage) 83% 180 sec 76 37 sec 400 15 min Osee 

84% AFUE - Improved Heat Transfer Coef. 84% 180 sec 76 37 sec 400 15 min Osee 

84% AFUE - Modulation (Two-Stage) 84% 180 sec 76 37 sec 400 15 min Osee 

85% AFUE - Improved Heat Transfer Coef. 85% 180 sec 76 37 sec 400 15 min Osee 

85% AFUE - Modulation (Two-Stage) 85% 180 sec 76 37 sec 400 15 min Osee 

86%AFUE 86% 180 sec 76 37 sec 400 15 min Osee 

91%AFUE 91% 180 sec 76 37 sec 400 15 min Osee 

99%AFUE 99% 180 sec 76 37 sec 400 15 min Osee 

L-9 
Table L.3.6 Energy Use Parameters for Hot-Water Oil Boilers

Description EffyHS tp PE tIG PIG t+ t

80% AFUE - Baseline 80% 180 sec 220 26 min 45 15 min 0 sec

81 % AFUE - Improved Heat Transfer Coef 81% 180 sec 220 26 min 45 15 min 0 sec

81 % AFUE - Interrupted Ignition 81% 180 sec 220 45 sec 25 15 min 0 sec

82% AFUE - Improved Heat Transfer Coef. 82% 180 sec 220 26 min 45 15 min 0 sec

82% AFUE - Interrupted Ignition 82% 180 sec 220 45 sec 25 15 min 0 sec

82% AFUE - Modulation (Two-Stage) 82% 180 sec 220 45 sec 25 15 min 0 sec

83% AFUE - Improved Heat Transfer Coef. 83% 180 sec 220 26 min 45 15 min 0 sec

83% AFUE - Interrupted Ignition 83% 180 sec 220 45 sec 25 15 min 0 sec

83% AFUE - Modulation (Two-Stage) 83% 180 sec 220 45 sec 25 15 min 0 sec

84% AFUE - Improved Heat Transfer Coef 84% 180 sec 220 26 min 45 15 min 0 sec

84% AFUE - Interrupted Ignition 84% 180 sec 220 45 sec 25 15 min 0 sec

84% AFUE - Modulation (Two-Stage) 84% 180 sec 220 45 sec 25 15 min 0 sec

85% AFUE - Improved Heat Transfer Coe£ 85% 180 sec 220 26 min 45 15 min 0 sec

85% AFUE - Interrupted Ignition 85% 180 sec 220 45 sec 25 15 min 0 sec

85% AFUE - Modulation (Two-Stage) 85% 180 see 220 45 sec 25 15 min 0 sec

86% AFUE - Improved Heat Transfer Coef. 86% 180 sec 220 26 min 45 15 min 0 sec

86% AFUE - Interrupted Ignition 86% 180 sec 220 45 sec 25 15 main 0 sec

86% AFUE - Modulation (Two-Stage) 86% 180 sec 220 45 sec 25 15 min 0 sec

90% AFUE 90% 180 sec 220 45 sec 25 15 min 0 sec

95% AFUE 95% 180 sec 220 45 sec 25 15 min 0 sec

 EE-RM/STD-01-350 COMMENT 164

T a bi e L 36 E " " nergy u se p arameters ~ or H o -tW ater O"IB I 01 "I ers 

Description EffYHS tp PE tIG PIG t+ t80% AFUE - Baseline 80% 180 sec 220 26 min 45 15 min o sec 

81 % AFUE - Improved Heat Transfer Coef. 81% 180 sec 220 26 min 45 15 min o sec 

81 % AFUE - Interrupted Ignition 81% 180 sec 220 45 sec 25 15 min o sec 

82% AFUE - Improved Heat Transfer Coef. 82% 180 sec 220 26 min 45 15 min o sec 

82% AFUE - Interrupted Ignition 82% 180 sec 220 45 sec 25 15 min o sec 

82% AFUE - Modulation (Two-Stage) 82% 180 sec 220 45 sec 25 15 min o sec 

83% AFUE - Improved Heat Transfer Coef. 83% 180 sec 220 26 min 45 15 min o sec 

83% AFUE - Interrupted Ignition 83% 180 sec 220 45 sec 25 15 min o sec 

83% AFUE - Modulation (Two-Stage) 83% 180 sec 220 45 sec 25 15 min o sec 

84% AFUE - Improved Heat Transfer Coef. 84% 180 sec 220 26 min 45 15 min o sec 

84% AFUE - Interrupted Ignition 84% 180 sec 220 45 sec 25 15 min o sec 

84% AFUE - Modulation (Two-Stage) 84% 180 sec 220 45 sec 25 15 min o sec 

85% AFUE - Improved Heat Transfer Coef. 85% 180 sec 220 26 min 45 15 min o sec 

85% AFUE - Intemlpted Ignition 85% 180 sec 220 45 sec 25 15 min o sec 

85% AFUE - Modulation (Two-Stage) 85% 180 sec 220 45 sec 25 15 min o sec 

86% AFUE - Improved Heat Transfer Coef. 86% 180 sec 220 26 min 45 15 min o sec 

86% AFUE - Interrupted Ignition 86% 180 sec 220 45 sec 25 15 min o sec 

86% AFUE - Modulation (Two-Stage) 86% 180 sec 220 45 sec 25 15 min o sec 

90%AFUE 90% 180 sec 220 45 sec 25 15 min o sec 

95%AFUE 95% 180 sec 220 45 sec 25 15 min o sec 

L-I0 
REFERENCES

American Society of Heating Refrigerating and Air-Conditioning Engineers Inc., Method

of Testingfor Annual Fuel Utilization Efficiency of Residential Central Furnaces and

Boilers, October, 2003. Atlanta, GA. Report No . BSR/ASHRAE Standard 103-1993R.

First Public Review.

2. Gas Appliance Manufacturers Association (GAMA), GAMA Directory March 2005, 2005.

(Last accessed March, 2005.)

<http: //www. gamanet. org/gama/inforesources. nsf/vAllDocs/Product+Directories?OpenDo

cument>

3. U.S. Department of Energy, Title 10, Code of Federal Regulations, Chapter II Part 430

Appendix N, Subpart B-Uniform Test Method for Measuring the Energy Consumption of

Furnaces and Boilers, January 1, 2007.

4. Honeywell Inc., Hot Surface Modules: S89C, D, G, H, J and S890C, D, G, H, J, 1989.

Form Number: 68-0079-1.

5. Carlin Combustion Technology Inc., Oil Burner Ignition Systems: Interrupted Duty vs.

Intermittent Duty, 2002. (Last accessed October 29, 2002.)

<http://www.carlincombustion.com/TechLib/tech-Speakingl.html>

6. Brookhaven National Laboratory, Comparison of Burner Operating Options, 1994.

Brookhaven National Laboratory.

7. Gable, G., Report to Lawrence Berkeley National Laboratory on Gas Furnace Ignition

Systems, 2003.

8. Oswald, K., Report to Lawrence Berkeley National Laboratory on Pumps and Burners,

2002.

9. Taco Inc., 110-120 Red Baron Circulators, 2003.

 EE-RM/STD-01-350 COMMENT 164

REFERENCES 

1. American Society of Heating Refrigerating and Air-Conditioning Engineers Inc., Method 

of Testingfor Annual Fuel Utilization Efficiency of Residential Central Furnaces and 

Boilers, October, 2003. Atlanta, GA. Report No. BSRlASHRAE Standard 103-1993R. 

First Public Review. 

2. Gas Appliance Manufacturers Association (GAMA), GAMA Directory March 2005,2005. 

(Last accessed March, 2005.) 

<http://www.gamanet.org/gama/inforesources.nsf/vAllDocs/ProducHDirectories?OpenDo 

cument> 

3. U.S. Department of Energy, Title 10, Code of Federal Regulations, Chapter II Part 430 

Appendix N, Subpart B-Uniform Test Methodfor Measuring the Energy Consumption of 

Furnaces and Boilers, January 1,2007. 

4. Honeywell Inc., Hot Surface Modules: S89C, D, G, H, J and S890C, D, G, H, J, 1989. 

Form Number: 68-0079-1. 

5. Carlin Combustion Technology Inc., Oil Burner Ignition Systems: Interrupted Duty vs. 

Intermittent Duty, 2002. (Last accessed October 29,2002.) 

<http://www.carlincombustion.comiTechLib/tech _speaking 1.html> 

6. Brookhaven National Laboratory, Comparison of Burner Operating Options, 1994. 

Brookhaven National Laboratory. 

7. Gable, G., Report to Lawrence Berkeley National Laboratory on Gas Furnace Ignition 

Systems, 2003. 

8. Oswald, K., Report to Lawrence Berkeley National Laboratory on Pumps and Burners, 

2002. 

9. Taco Inc., 110-120 Red Baron Circulators, 2003. 

L-ll