Planning a new build is an exciting time but it also comes with a lot of moving parts. One of the most important systems in your new home or building is the HVAC system. From ductwork to thermostats, the process of getting your heating and cooling system installed efficiently and correctly can impact your long-term comfort, energy bills, and indoor air quality.

At Alpine Heating & Air, we often get asked the same question: how long does new construction HVAC install take? The answer depends on a few factors, but we’re here to break it down and help you understand the full scope of the installation process.

General HVAC Installation Timeline

In most cases, the HVAC installation process in a new construction project takes 3 to 10 days from start to finish. However, that timeline can vary based on the size of the home, type of system, and coordination with other trades on-site.

Typical breakdown:

  • Planning & Design – 1 to 2 days (before construction begins)
  • Rough-In Installation – 2 to 5 days (during framing)
  • System Setup & Final Installation – 1 to 3 days (after interior finishes)
  • Testing & Calibration – 1 day

Keep in mind that these phases may not occur back-to-back. Timing often depends on progress in other parts of the build.

What Affects HVAC Installation Time?

hvac maintenance repair

We get it! It can be so frustrating when you’re ready for your home to be back to normal and something unexpected comes up and the timeline is looking longer and longer. There are several factors that affect how long it takes to get your HVAC system installed in a new build. Here’s what to consider:

Size Of Your Home Or Building

Larger homes or multi-level properties naturally require more ductwork, equipment, and time to complete. Bigger installations with multiple units or zoned systems can also extend the timeline.

System Type

A traditional central HVAC system, a heat pump, or a mini split system will each have different installation needs. Mini splits, for example, can be quicker to install in smaller spaces, while ducted systems take longer due to extensive layout planning and ductwork installation.

Ductwork Requirements

If your new construction involves custom ductwork or complex layouts, that will add time. Even in new builds, some ductwork modifications or reconfigurations may be necessary for optimal efficiency.

Coordination With Other Trades

Your HVAC contractor works alongside electricians, plumbers, and framers. If another team is delayed or if access to part of the structure is blocked, it could impact the overall installation time.

Weather Conditions And Site Access

In colder months, installing outdoor components like the condenser unit or heat pump can be slowed by frozen ground or inclement weather. Difficult site access or muddy construction zones can also cause delays.

Phases of New Construction HVAC Installation

To avoid any unexpected road blocks, be thinking about when and where your HVAC will need to be installed and more importantly who’s going to install it. Installing a new HVAC system is about more than just placing a few units. Here’s a look at each step involved:

Planning and System Design

Before construction begins, we evaluate your building plans, square footage, and layout to determine the best system size and equipment type. Proper sizing ensures your system doesn’t overwork, helps reduce energy bills, and ensures consistent heating and cooling throughout the space.

Rough-In Installation

Once the framing is in place, we begin running ductwork, refrigerant lines, drain lines, and placing air handlers or furnaces. This phase includes:

  • Planning for mount type
  • Ensuring proper airflow across all rooms
  • Coordinating with framing and plumbing teams
  • Installing key components inside walls or ceilings

Equipment Installation

After drywall and finishes go in, we return to install the outdoor unit, thermostat, and registers. This phase includes:

  • Placing and connecting the air conditioner
  • Installing vents, grilles, and essential components
  • Wiring your system and calibrating settings

Testing and Final Adjustments

Finally, we perform a full system check to ensure everything is running smoothly. Our technicians will:

  • Verify correct refrigerant charge
  • Test for proper airflow
  • Set your thermostat
  • Inspect for any installation errors
  • Confirm the system heats and cools as expected

How to Keep Your HVAC Installation on Schedule

If you want to stay on schedule and make sure your new HVAC installation goes off without a hitch, follow these tips:

  • Choose a reliable HVAC company – At Alpine Heating & Air, we pride ourselves on showing up on time, communicating clearly, and getting the job done right.
  • Communicate with your builder – Make sure your general contractor is coordinating all the trades properly to avoid timeline conflicts.
  • Have a clear layout – If you change your floor plan mid-build, it may impact ductwork and installation times.
  • Plan for proper ventilation – We’ll help you make sure your home has optimal ventilation and airflow to prevent hot or cold spots.

When Will the System Be Operational?

You don’t need to be on-site during every part of the HVAC installation process, but being available for questions or walkthroughs can help keep things moving. If you’re working with a general contractor, we’ll stay in close communication with them as well.

Once your system is fully installed and tested, your HVAC unit can be turned on. In many cases, this happens just before your move-in date so the house is comfortable and ready. We’ll also show you how to use your thermostat, maintain the system, and understand your warranty.

Why Work With Alpine Heating & Air?

Our team has years of experience working with new construction HVAC installations throughout the region. We understand the demands of a construction project and the importance of staying on time and on budget.

From building your dream home or developing a new commercial space, we’ll help you choose the right heating and cooling systems, handle every part of the installation, and make sure everything is set up for long-term performance.

Let Us Take The Stress

Ready to be done with the stress of a new build? We’ll walk you through the installation process, provide a clear timeline, and ensure your new space is comfortable from day one. Contact us today to schedule a consultation and get your new HVAC system installed the right way.