What scale is used for HERS ratings, and what does a lower score indicate?

The HERS Index is specifically designed to evaluate the energy efficiency of residential buildings. In this scale, a lower score signifies better energy efficiency performance of the home. A home with a HERS Index score of 0 represents a net-zero energy home, while a score of 100 indicates a home that meets the minimum energy requirements set by the International Energy Conservation Code (IECC). Therefore, as the HERS score decreases, it reflects a home's increased efficiency and reduced energy consumption, making the lower score desirable for homeowners aiming for sustainable living and cost savings on energy bills.

The other options offered do not accurately describe the scale used for HERS ratings or the implications of their scores. The ENERGY STAR Score, Efficiency Rating Scale, and Energy Conservation Index pertain to different energy efficiency assessments and metrics that do not align with the HERS Index's structure or scoring methodology.