When your current cooling system can’t keep up anymore, and you’ve exhausted AC repair options, replacing it can feel like a big project before it even begins. One of the first questions many homeowners ask is, “How long does it take to install an AC unit?”
The timeline ultimately depends on the size of your home, the type of system, and whether any ductwork or electrical updates are needed. However, most installations are completed within a few hours.
Professional air conditioning installation is the single best way to ensure you get the most from the new AC you’ve selected. Whether you’re choosing a central air system, mini-split ductless system, or heat pump, AC system installation is best left to HVAC specialists at ARS/Rescue Rooter for speed, convenience, safety, and efficiency.
Here’s a look at our step-by-step AC installation process, costs, new unit lifespans, and more.
Our 4 Step New AC Installation Process
1. Evaluation and Removal of Your Old System
The old system must be removed before your new air conditioner can be installed. Our technicians always take care to protect the surrounding area and clean up after removal. In most cases, your installer will also handle the disposal of your old air conditioning unit.
Afterward, your installer will conduct a comprehensive evaluation of your home’s existing cooling infrastructure to identify air duct leaks or other issues that could affect your new system’s performance. If repairs are needed, you will be notified before they are addressed.
2. Installation of the New Air Conditioning System
After removal, your technician will begin the AC installation process, which may require new piping, electrical connections, and ductwork, depending on your old and new AC models. During this process, all electrical connections will be checked, and your new air conditioner will be tested to ensure it works properly.
3. Installation or Inspection of Your Thermostat
Most new air conditioning systems come with a new thermostat. If you’d like the new thermostat installed, your installer will do so during the same visit.
If you choose to install a completely separate thermostat system, such as a smart or Nest Learning thermostat, your air conditioning installer can do so if you have your new thermostat on hand. If not, you can schedule a future service call for new thermostat installation. Your installer will make sure you know how to use any new thermostat that is installed before they leave.
4. Final Check and Maintenance Suggestions
After the installation of the air conditioning system is complete, your technician will perform a final check. They will also go over any basic maintenance tasks you can handle on your own, along with how often they should be completed.
You can also schedule your first AC maintenance service now or choose to do so later. Your HVAC installer will let you know how often professional care is needed and can answer any additional questions you may have before your installation is complete.
Contact us at 866-399-2855 to get started.
AC Installation Process by System Type at a Glance
Central AC Installation Process for Homes with Ducts
Inspect existing ducts for leaks, damage, or airflow issues
Confirm the right system size with a load calculation
Install the condenser, air handler, and evaporator coil
Connect refrigerant lines, electrical wiring, and condensate drainage
Set up the thermostat or control system
Test the system for safe, efficient cooling
Ductless Mini-Splits and Heat Pumps
Plan cooling and heating zones for the home
Choose indoor air handler locations for proper airflow
Place the outdoor unit on a stable, accessible surface
Connect line sets, drain lines, and electrical wiring
Evacuate and charge the refrigerant lines as needed
Test each zone for comfort, airflow, and control settings
Swamp Coolers & Evaporative Coolers
Confirm the system is a good fit for your local climate
Choose a roof, ground, window, or ducted setup
Connect the water supply and electrical AC components
Set up ductwork, venting, pads, and airflow paths
Check water flow, cooling performance, and controls
Review pad replacement, winterization, and seasonal maintenance needs
Commercial AC Installation for Business Owners
Commercial installations often require more planning than residential AC system installations because the building’s size, layout, occupancy, and equipment all affect cooling needs. Before work begins, your contractor may also review issues such as uneven cooling, unusual AC odors, or possible Freon leaks to determine whether a repair or replacement is the best option.
Business owners and facility managers should expect considerations such as:
Building load calculations based on square footage, layout, windows, and insulation
Occupancy and equipment heat load from people, computers, appliances, and machinery
Code, permit, and inspection requirements
Rooftop access, crane needs, or equipment staging
Ductwork, zoning, thermostat, and building control setup
Project phasing to reduce disruption during business hours
Final commissioning to confirm performance, airflow, and safety
Commercial AC installation costs vary based on building size, system type, efficiency rating, layout, and installation complexity.
How Much Does AC Installation Cost?
AC installation prices vary widely based on factors like home size, system type, efficiency rating, ductwork condition, electrical needs, permits, and installation complexity. For example, a split AC installation process may cost more than a simple replacement if it requires new indoor units, line sets, drains, or multi-zone controls.
According to the Center for Energy and Environment, a high-efficiency traditional AC unit can cost $5,000–$6,000, while an air-source heat pump can cost $12,000–$24,000. ARS/Rescue Rooter can help you review your options and provide upfront pricing before work begins.
We also offer financing options to help make costs more manageable. Plus, all of our services are backed by our Exceptional Service Guarantee.
How Long Does an AC Unit Last?
We recommend replacing AC units every 8 to 10 years and heat pumps every 8 years. However, several factors can affect a unit’s lifespan, including the type of system and model, along with how well it’s maintained. Scheduling regular maintenance can keep your AC performing at its best and help avoid surprises when turning it on after winter.
Book Your Installation with ARS/Rescue Rooter
If you are looking for an evaluation of your existing AC system, a free replacement estimate, or even a second opinion on AC system installation, you can trust the experts at ARS/Rescue Rooter. Professional air conditioning installation by our experts is the best way to ensure your new HVAC system performs at its best. Find our nearest location, schedule an estimate online, or call 866-399-2885 today to get the process started.
Frequently Asked Questions
Not always. Central air requires ductwork, but ductless mini-splits or heat pumps can cool homes without existing ducts.
A mini-split may be better for homes without ducts, home additions, garages, or rooms with uneven temperatures. Central air may be better if you already have ductwork and want consistent whole-home cooling.
A swamp cooler may be a good fit if you live in a dry climate, have sufficient ventilation, and want an alternative to traditional AC. It may not cool well in humid climates where evaporative cooling is less effective.
