BE circulating air fan (or circulating water pump) electrical energy input rate at full-load steady-state operation, as defined in 9.1 of ANSI/ASHRAE 103-82 QIN as defined in 11.2.34 of ANSI/ASHRAE 103-82

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

nu as defined in 4.6 of this appendix

2 ratio of the average length of a heating season in hours to the average heating load hours

tas defined in 3.3 of this appendix tas defined in 9.3.1 of ANSI/ASHRAE 103-82

For furnaces and boilers equipped with two stage thermostats or step-modulating thermostats, calculate the national average number of burner operating hours at the reduced operating mode (BOH RED) defined as: BOHRED=X1 EM/QIN-RED

BOH as defined in 4.7 of this appendix QIN as defined in 11.2.34 of ANSI/ASHRAE 103-82

==

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

8760 as defined in 4.7 of this appendix

For furnaces and boilers equipped with either two stage thermostats or step-modulating thermostats, calculate Er as defined

as:

Ep Em+4600 QP

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:

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=[(EF-8760 Qp)HLH/2080]+8760 QP

where:

=

E, 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:

EAER = EAEHLH/2080

where:

EAE as defined in 4.9 of this appendix HLH= =as defined in 4.11 of this appendix 2080-as defined in 4.7 of this appendix

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

EER 100(0.77)DHR HLH/3.412 AFUE

==

where:

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(EF-4600 Qp]/[Ep+3412 EAE]

where: