The answer to 'what does system upgrade do' is that a system upgrade refers to replacing or improving the major components of an HVAC (heating, ventilation, and air conditioning) system. This can include upgrading the furnace, air conditioner, ductwork, or other core components to improve efficiency, performance, and indoor comfort. A system upgrade often involves replacing older, less efficient equipment with newer, more advanced models that use less energy and provide better climate control.
Upgrading an HVAC system can provide several benefits for homeowners, such as lower utility bills, improved indoor air quality, and better temperature regulation throughout the home. It can also increase the value of the home and extend the lifespan of the system. However, a system upgrade is a significant investment, so it's important to carefully evaluate the costs and potential savings before making a decision.