Section N1106 (R406) Energy Rating Index Compliance Alternative
Compliance with this section requires that the provisions identified in Sections N1101.13 through N1104 indicated as "mandatory" and in Section N1103.5.3 be met. The building thermal envelope shall be greater than or equal to levels of efficiency and Solar Heat Gain Coefficients in Table 402.1.1 or 402.1.3 of the 2009 International Energy Conservation Code.
Exception: Supply and return ducts not completely inside the building thermal envelope shall be insulated to an R-value of not less than R-6.
The Energy Rating Index (ERI) shall be determined in accordance with RESNET/ICC 301 except that the ERI reference design ventilation rate shall be in accordance with Equation 11-1.
(Equation 11-1)
Energy used to recharge or refuel a vehicle used for transportation on roads that are not on the building site shall not be included in the ERI reference design or the rated design.
| CLIMATE ZONE | ENERGY RATING INDEXa |
| 1 | 57 |
| 2 | 57 |
| 3 | 57 |
| 4 | 62 |
| 5 | 61 |
| 6 | 61 |
| 7 | 58 |
| 8 | 58 |
- Where on-site renewable energy is included for compliance using the ERI analysis of Section N1106.4, 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 International Residential Code.
Compliance software tools shall generate a report that documents that the ERI of the rated design complies with Sections N1106.3 and N1106.4. The compliance documentation shall include the following information:
- Address or other identification of the residential building.
- An inspection checklist documenting the building component characteristics of the rated design. The inspection checklist shall show results for both the ERI reference design and the rated design, and shall document all inputs entered by the user necessary to reproduce the results.
- Name of individual completing the compliance report.
- Name and version of the compliance software tool.
Exception: Where an otherwise identical building model is offered in multiple orientations, compliance for any orientation shall be permitted by documenting that the building meets the performance requirements in each of the four (north, east, south and west) cardinal orientations.
The code official shall be permitted to require the following documents:
- Documentation of the building component characteristics of the ERI reference design.
- A certification signed by the builder providing the building component characteristics of the rated design.
- Documentation of the actual values used in the software calculations for the rated design.