The answer to 'what is system upgrade' is a process of improving or replacing the existing HVAC (Heating, Ventilation, and Air Conditioning) system in a home. This can involve upgrading to a more energy-efficient, higher-capacity, or technologically advanced system that better meets the homeowner's needs and provides improved comfort, efficiency, and reliability.
A system upgrade may include replacing the furnace, air conditioner, or heat pump, as well as upgrading the ductwork, thermostats, and other components. This can be done to improve the overall performance of the HVAC system, reduce energy costs, and ensure the home's heating and cooling needs are met effectively.