The answer to 'how long does installation last' is that a typical HVAC system installation can take 1-3 days to complete, depending on the complexity of the project. This includes the time needed to properly size the system, run new ductwork, install the indoor and outdoor units, and ensure proper airflow and ventilation throughout the home.
Smaller projects like a single-unit replacement may only take 1 day, while a complete system overhaul with major ductwork changes could take 2-3 days. The installation timeline can also vary based on factors like the accessibility of the work area, whether any structural modifications are required, and the availability of the HVAC technicians and equipment.