The answer to 'what does replacement do' is replacement refers to the process of installing a new HVAC system or component to fully replace an older, outdated, or malfunctioning unit. Replacement is often necessary when an HVAC system has reached the end of its lifespan, typically 10-15 years for most systems, or when major components like the compressor or furnace fail.
Replacement allows homeowners to upgrade to a newer, more energy-efficient system that can provide better comfort and reduced energy costs. It also ensures the home has a reliable, properly functioning HVAC system that will continue to keep the home at a comfortable temperature for years to come.