What are the main components evaluated by a HERS rater during an assessment?

The main components evaluated by a HERS rater focus on aspects that significantly affect a home's energy efficiency and overall performance. Insulation, windows, HVAC systems, and airtightness are critical elements in determining how well a house retains energy, how effectively it heats and cools spaces, and how much energy loss occurs.

Insulation plays a vital role in reducing the need for heating and cooling by minimizing temperature transfer between the interior and exterior of the home. Windows are essential not only for natural light but also for preventing heat loss or gain, depending on the season. The HVAC systems are central to a home's energy performance; their efficiency directly affects energy consumption. Lastly, airtightness is crucial, as it helps prevent unwanted air leaks that can undermine heating and cooling efforts, leading to increased energy use.

Each of these components works together to create a well-functioning home energy system, which is why they are the focus during HERS assessments. Understanding their impact allows homeowners to make informed decisions about upgrades or retrofits that improve energy efficiency.