What type of heating system is most commonly evaluated for efficiency in an energy audit?

The most commonly evaluated type of heating system for efficiency in an energy audit is the forced air heating system. This is primarily due to its widespread use in residential settings and its distinct operational characteristics that directly affect energy consumption.

Forced air systems utilize a network of ducts to distribute heated air throughout a building. During an energy audit, it's essential to assess how efficiently this system operates, as problems such as duct leakage, improper insulation, and the condition of filters can significantly impact overall energy performance.

The evaluation often includes checking the system's efficiency rating, airflow, and ensuring that the thermostat and controls function optimally. Additionally, many inspectors focus on forced air systems because they provide a clear demonstration of energy loss and potential savings opportunities, making them a primary focus in energy audits.

While other heating systems such as radiant, hydronic, and geothermal also have their own efficiency considerations, forced air systems are typically the most prominent in residential energy audits due to their commonality and the extensive measures that can be taken to improve their efficiency.