Which of the following factors can impact the efficiency of an HVAC system?

The efficiency of an HVAC system is significantly influenced by the proper installation, maintenance, and sizing of the equipment in relation to the space it serves. Proper installation ensures that the system operates as designed, minimizing energy losses through improper ductwork or placement. Regular maintenance keeps the system running efficiently by addressing issues such as dirty filters or refrigerant levels, which can otherwise lead to increased energy consumption. When the equipment is appropriately sized, it can effectively manage the heating and cooling loads, preventing short cycling or unnecessary strain on the system. All these factors work together to optimize the system's performance and energy efficiency, ensuring that it provides comfortable conditions without excessive energy use.