Improving energy efficiency in a commercial HVAC system involves several steps. First, schedule regular maintenance to ensure all components, such as filters, coils, and ducts, are clean and functioning correctly. Consider upgrading to energy-efficient HVAC units with higher SEER ratings or adding smart thermostats for better temperature control. Installing zoning systems allows different areas to be heated or cooled as needed, reducing waste. Additionally, proper insulation of ductwork and sealing air leaks can minimize energy loss. Regularly checking for and addressing leaks, malfunctioning parts, and inefficient airflow also contributes to better energy efficiency and reduced utility costs.