APPENDIX AX (RC)
ZERO ENERGY RESIDENTIAL BUILDING PROVISIONS
The provisions contained in this appendix are not mandatory unless specifically referenced in the adopting ordinance.
SECTION AX 101(RC101)
COMPLIANCE
SECTION AX 102 (RC102)
ZERO ENERGY RESIDENTIAL BUILDINGS
AX102.2 (RC102.2) Energy Rating Index zero energy score.
Compliance with this section requires that the rated design be shown to have a score less than or equal to the values in Table AX102.2 when compared to the ERI reference design determined in accordance with RESNET/ICC 301 for both of the following:
1.ERI value not including on-site power production (OPP) calculated in accordance with RESNET/ICC 301.
2.ERI value including on-site power production calculated in accordance with RESNET/ICC 301 with the OPP in Equation 4.1.2 of RESNET/ICC 301 adjusted in accordance with Equation AX-1.
(Equation AX-1)where:
CREF = Community Renewable Energy Facility power production—the yearly energy, in kilowatt hour equivalent (kWheq), contracted from a community renewable energy facility that is qualified under applicable state and local utility statutes and rules, and that allocates bill credits to the rated home.
REPC = Renewable Energy Purchase Contract power production—the yearly energy, in kilowatt hour equivalent (kWheq), contracted from an energy facility that generates energy with photovoltaic, solar thermal, geothermal energy, or wind systems, and that is demonstrated by an energy purchase contract or lease with a duration of not less than 15 years.
TABLE AX102.2 (RC102.2)
MAXIMUM ENERGY RATING INDEXa
| CLIMATE ZONE | ENERGY RATING INDEX NOT INCLUDING OPP | ENERGY RATING INDEX INCLUDING ADJUSTED OPP (as proposed) |
| 1 | 43 | 0 |
| 2 | 45 | 0 |
| 3 | 47 | 0 |
| 4 | 47 | 0 |
| 5 | 47 | 0 |
| 6 | 46 | 0 |
| 7 | 46 | 0 |
| 8 | 46 | 0 |
a.The building shall meet the mandatory requirements of Section N1106.2, and the building thermal envelope shall be greater than or equal to the levels of efficiency and SHGC in Table N1102.1.2 or Table N1102.1.4 of the 2015 South Carolina Residential Code.