How Long Does HVAC Installation Take? A Step-by-Step Timeline

June 25, 2025•3 min read

Thinking about replacing or upgrading your HVAC system? You might be wondering just how long the installation process will take—and what exactly to expect along the way. While every project is different, there’s a general timeline most reputable contractors follow to get the job done efficiently and safely.

In this post, we’ll walk you through a typical HVAC installation timeline from start to finish. Whether you're planning ahead or in need of an urgent replacement, knowing what’s involved can help you prepare your home and your schedule.

Step 1: In-Home Consultation (1–2 Hours)

It all starts with a visit from your HVAC contractor. During the consultation, a technician evaluates your current system, takes measurements of your home, and discusses your heating and cooling needs. They may also inspect your ductwork and assess insulation levels.

This step is critical. A system that’s too big or too small can lead to inefficiency and higher energy bills. Your contractor will recommend the right system size and model, then provide a quote based on your home’s specific requirements.

Timeline tip: Expect the visit to last about 1 to 2 hours. If you're comparing bids, it could take an extra day or two to finalize your choice.

Step 2: System Ordering and Scheduling (1–5 Days)

Once you’ve chosen your contractor and system, the next step is ordering the equipment. If the model is in stock, your installation can be scheduled quickly—usually within a few days. If special components need to be ordered, this may take longer depending on availability.

During this time, your contractor will also schedule a date for the installation and give you a prep checklist (such as clearing space around the unit or ensuring pets are secure).

Step 3: HVAC Installation Day (1–3 Days)

This is where the real work begins. On the scheduled date, the team will arrive early and begin removing the old system. Depending on the complexity of your setup, the installation itself can take anywhere from 4 hours to 3 days. Here's a rough breakdown:

Standard replacement: 1 day
Install with ductwork modifications: 1–2 days
Full new installation with ducts: 2–3 days

Your HVAC contractor will connect the new unit, hook up the ductwork, install thermostats, and test all system components. Safety checks and inspections are also conducted to make sure everything meets code.

Step 4: Inspection and Final Walkthrough (1–2 Hours)

Before wrapping up, the technician will walk you through how the system works, answer your questions, and test it under different settings. Some cities require a permit and final inspection from the local building department, which could add a few more days depending on your municipality’s schedule.

Make sure to ask for a maintenance guide and warranty details during this phase—it’ll save you headaches down the road.

Case Study: Fast, Efficient Upgrade in Cedarburg

A family in Cedarburg, WI recently upgraded their aging furnace and AC unit through Champion Air Mechanical, a trusted HVAC contractor Cedarburg WI residents rely on. Their old system was removed and a new high-efficiency unit was installed in just under two days. With minimal disruption to their routine, the homeowners were impressed by the crew’s professionalism and cleanup. This is the level of service you can expect from a reputable residential and commercial HVAC contractor with experience and proper licensing.

Final Thoughts

From the first consultation to the final test, most HVAC installations take between 1 to 3 days, not including planning and permitting. The timeline depends on the scope of the project, equipment availability, and whether ductwork is involved.

To make the process smoother: