The answer to 'how long does installation last' is that a typical HVAC system installation can take between 1-3 days to complete, depending on the complexity of the job. This includes time for the technicians to properly size the new equipment, run new ductwork, install the indoor and outdoor units, and ensure the system is working efficiently.
Larger or more complex installations, such as adding a whole-home humidifier or zoning system, may take up to a week to finish. The installation timeline can also vary based on factors like the accessibility of the work area, the need for any structural modifications, and the availability of the technicians. It's important to work with a professional HVAC contractor who can provide an accurate estimate of the installation timeline for your specific project.