X' as defined in 4.5.2 of this appendix E-average annual energy used during the heating season

EM=(QIN-MAX-Q,)BOHss+(8760-4600)QD QIN.RED=as defined in 4.5.6 of this appendix QIN. MAX=as defined in 4.5.7 of this appendix Q, =as defined in 11.2.34 of ANSI/ASHRAE 103-82

BOHSS-as defined in 4.7 of this appendix in which nu.wt replaces nu for calculating the values of A and B and the term (PE + y BE) in the factor A is increased by the ratio, R. It is defined as:

2.3 for two stage controls

2.3 for step-modulating controls when the ratio of minimum-tomaximum output is greater than or equal to 0.5

where:

EM-as defined in 4.7 of this appendix 4600 as defined in 4.6 of this appendix Qp-as defined in 11.2.34 of ANSI/ASHRAE 103-82

4.9 Average annual auxiliary electrical energy consumption for gas or oil fueled furnaces or boilers. For furnaces and boilers equipped with single stage thermostats, calculate the average annual auxiliary electrical energy consumption (EAE) expressed in kilowatt-hours per year and defined as:

=

BERED)

where: BOHRED =as defined in 4.7 of this appendix PERED as defined in 4.9 of this appendix y=as defined in 4.7 of this appendix BERED =as defined in 4.9 of this appendix BOHMOD as defined in 4.7 of this appendix PEMAX =as defined in 4.9 of this appendix BEMAX=as defined in 4.9 of this appendix

4.10 Average annual electric energy consumption for electric furnaces or boilers. For electric furnaces and boilers, calculate the average annual electric energy consumption (EE) expressed in kilowatt-hours per year and defined as:

EE=100(2080)(0.77) DHR/3.412 AFUE

with different design heating requirements. For gas or oil fueled furnaces and boilers, calculate the average annual fuel energy consumption for a specific geographic region and for a specific typical design heating requirement (EFR) expressed in Btu's per year and defined as:

EFR=[(Ep-8760 Qp)HLH/20801+8760 QP

where:

Ep=

=as defined in 4.8 of this appendix 8760 as defined in 4.7 of this appendix

=

Qp as defined in 11.2.34 of ANSI/ASHRAE 103-82

HLH heating load hours for a specific geographic region determined in accordance with the heating load hour map in Figure 1 of this appendix

2080-as defined in 4.7 of this appendix

4.12 Average annual auxiliary electrical energy consumption for gas or oil fueled furnaces or boilers located in different geographic regions of the United States and in buildings with different design heating requirements. For gas or oil fueled furnaces and boilers, calculate the average annual auxiliary electrical energy consumption for a specific geographic region and for a specific typical design heating requirement (EAER) expressed in kilowatt-hours per year and defined as:

100 as defined in 4.10 of this appendix 0.77 as defined in 4.7 of this appendix DHR as defined in 4.7 of this appendix HLH as defined in 4.11 of this appendix 3.412 as defined in 4.10 of this appendix AFUE as defined in 4.1 of this appendix

=

4.14 Energy factor. For electric furnaces and boilers, the energy factor (EF) is equal to AFUE, as defined in section 4.1 of this appendix. For gas and oil furnaces and boilers, calculate EF as defined as:

EF-nu[Er-4600 Qp]/[Ep+3412 EAE]

where: