What aspect of HVAC systems can affect energy consumption?

The age and condition of the HVAC equipment is a significant factor influencing energy consumption. Older systems tend to be less efficient due to wear and tear, outdated technology, and potential deficiencies in components such as compressors, fans, and other essential parts. Over time, degradation can lead to increased energy use, as the system works harder to maintain desired indoor temperatures. Regular maintenance can mitigate these effects, but as systems age, they inherently become less efficient and consume more energy.

Other factors, such as thermostat settings, the type of refrigerant used, and ductwork design certainly play roles in overall energy efficiency; however, they do not have the same profound impact as the age and condition of the equipment. For instance, even with ideal thermostat settings and high-efficiency refrigerants, an older, poorly maintained system may still result in high energy consumption. Therefore, understanding the condition and efficiency of the HVAC system itself is crucial for evaluating and managing energy use effectively.