What does a home energy rating system (HERS) allow homebuyers to do?

The home energy rating system (HERS) is designed to provide a comprehensive assessment of a home's energy efficiency and to estimate the anticipated energy costs associated with that home. This rating system uses a standardized methodology to evaluate how much energy the home is likely to consume based on its design, construction, and how it uses energy for heating, cooling, and other functions.

By allowing homebuyers to compare estimated energy costs, HERS empowers them to make informed decisions about potential purchases. It highlights homes that are more energy-efficient, which can lead to lower utility bills over time. This comparative aspect is crucial for buyers who want to not only find a home that fits their needs but also consider the ongoing costs associated with energy consumption.

The other options, while relevant in various contexts of home purchasing, do not pertain to the specific functionality and purpose of the HERS rating system. Comparing square footage, evaluating neighborhood safety, and calculating property tax rates involve different aspects of real estate that are not covered by the energy rating assessment. Thus, option B is the most appropriate answer, as it accurately reflects the primary role of the HERS in aiding homebuyers.