Nate Core Practice Test 2025 – Comprehensive Exam Prep

Dirty filters are a common factor that can significantly increase energy consumption in HVAC systems. When air filters are clogged with dust and debris, they restrict airflow, causing the system to work harder to circulate air throughout the building. This increased workload results in higher energy consumption as the HVAC system has to run longer and at higher performance levels to maintain desired indoor temperatures. Regular maintenance, including filter replacement, is crucial to ensure optimal airflow and efficiency, thereby reducing energy costs.

In contrast, certain weather conditions can affect energy demand but are not an inherent factor within the HVAC system itself. Upgraded thermostats typically enhance efficiency by allowing for better control and scheduling of temperatures, which can lower energy use. The installation of eco-friendly refrigerants may also be aimed at improving system efficiency and reducing environmental impact, rather than increasing energy consumption.