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How Much Does a New Air Conditioning Unit Cost to Install?

Install an AC Unit Costs
Average reported costs
based on 10,705 cost profiles
Most homeowners
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$3,692 - $7,134
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When the hot summer months approach and you find yourself standing in front of the fan to keep cool, you dream of having air conditioning to cool down your whole house. While air conditioning installation isn't always complicated, it's usually best to work with an air conditioning contractor who will help to ensure it's done correctly. Here is more information on air conditioner installation and finding the right model for your home:

On This Page:

  1. Air Conditioner Cost Factors
  2. Common Air Conditioner Brands and Costs
  3. A/C Unit Installation Cost Factors

How Much Does Air Conditioning Cost?

Most homeowners report spending between $3,692 and $7,134 to have air conditioning installed. This price is more typical of a central A/C unit installation rather than a window air conditioner addition which typically averages about $300. Your total cost for the job will depend on the type of system you choose.

The size of your home will determine the type of air conditioning system you will need.

There are several types of systems, including:
  • Window units: installed in windows as a singular unit
  • Split systems: either as mini-split (ductless) or central systems that are installed as inside and outside units
  • Central system: uses duct system that's usually combined with the heating system to cool a whole house
  • Portable units: comes as a split, hose or evaporative system for ease of movement around the house
A window air conditioning unit will generally suffice to keep a smaller home cool on warm spring and summer days. The cost to install a window air conditioner averages between $150 and $300, depending on the size you need. Installing a window air conditioning unit can bring added comfort for a reasonable price, but it will be less powerful than a central air conditioning system.

If you have a bigger home with multiple rooms, you will probably need to have a central air conditioning system installed. Homeowners can pay between $500 and $4,000 for central air conditioning. The final cost will depend on the unit, additional installation items such as ductwork and the professional's installation rates. Here are some additional factors that will determine the kind of system you will need, as well as its price.

Measuring Home Size in BTUs

The first major factor in determining what kind of air conditioning system you'll need is the size of your home. Air conditioning units are measured in tons or the amount of heat they can remove from a home in one hour in British thermal units (BTUs)--more information on this measurement below. The larger your house, the more cooling power you'll need. However, bigger isn't better in every scenario. If the system is too large it will cycle on and off all the time, wasting energy and emitting a loud, disruptive sound. On the other hand, if the system is too small, it will run constantly and cool your house inefficiently.

New Air Conditioning Unit Load Calculation

An air conditioning contractor will do a load calculation to determine the proper air conditioning unit for your home. This calculation takes into account the climate, size, shape and orientation of your home, as well as its square footage. A professional will also look at the insulation, windows, walls, floors and other materials that compose your home. He will then examine any leaks, seals and existing ducts or vents. The general rule is that every 500 or 600 square feet requires one ton of cooling. However, this calculation varies from place to place and contractor to contractor.

Load calculating is often referred to as the Manual J methodology. Cooling professionals use a variety of computations to analyze your home's heating and cooling characteristics, determining how much air it will lose. Factoring in environmental considerations like geography and solar rays, professionals can decide which system will best cool your home. There are two types of Manual J load calculations:
  • Whole House: Provides the air conditioning load calculations for a whole house with an existing duct system.
  • Room by Room: Used for calculating the air conditioning loads in every room of a house, which contributes to determining individual duct sizes and layout of a duct system

What are EER and SEER Ratings?

The best cooling unit for your home will be the most energy efficient and the least expensive to run. Air conditioning professionals help determine this factor in their load calculations, but the next step is looking at the energy efficiency ratio (EER) and seasonal energy efficiency ratio (SEER) ratings of cooling units. Here's what you need to know about these two units of efficiency.

EER Ratings

An EER certifies the cooling efficiency of HVAC units. It's calculated by the rate of the cooling in British thermal units (BTUs) per hour and divided by the rate of energy input in watts at a specific temperature. The calculation goes as BTUH/WATT at dry bulb (db) versus wet bulb (wb) temperatures. The optimal rating for a cooling unit is about 80db/67wb inside and 95db/75wb outside.

SEER Ratings

An air conditioning system's SEER is especially important if you live in a climate that changes temperature dramatically. The SEER is determined by the cooling output during the winter divided by its electric input during the winter. The higher the SEER rating, the more efficient it will be. Cooling units specifically must have a minimum SEER of 13 as of January 2006, according to U.S. standards, so if you live in a home with a system installed before then, consider having it replaced. SEER 13 units increase home efficiency by 30 percent.

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Common AC Unit Brands and Average Costs

Once you've determined the size of the air conditioning unit you need, it's time to look at different brands. Various manufacturers produce heating and cooling units, and there are pros and cons to each. Units also vary in cost, depending on bells and whistles. So, consult with a professional about what you need and ask about any additional features that may benefit your home. Here are some of the cooling unit manufacturers and their average costs (in alphabetical order):
  • Aire-Flo -- $1,700
  • Amana -- $2,600
  • American Standard -- $3,200
  • Armstrong -- $2,000
  • Bryant -- $2,200
  • Carrier -- $3,200
  • Coleman -- $1,700
  • Comfortmaker -- $1,700
  • Frigidaire -- $2,900
  • Gibson -- $2,300
  • Goodman -- $2,100
  • Heil -- $2,600
  • Lennox -- $3,400
  • Payne -- $1,400
  • Rheem -- $2,500
  • Ruud -- $2,400
  • Tempstar -- $1,800
  • Trane -- $3,300
  • Whirlpool -- $1,900
  • York -- $2,800
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Air Conditioning Installation Cost Factors

There are a few factors in addition to load calculation, energy efficiency ratings and brand manufacturers that homeowners should consider before they invest in an air conditioning system:

Installing the Air Conditioning Unit

It's important to have made an informed decision about an air conditioning system before initiating an installation, as this will determine a large percentage of your cost. If you decide to have a split or central system installed, you will need to hire an air conditioning professional to install the system. You cannot do this installation as a DIY project because it involves handling refrigerant, which cools the air. Professionals must be licensed by the Environmental Protection Agency (EPA) before they can handle this substance because it's a harmful chemical.

Installing an air conditioning system is an involved process. To that end, it requires the help of many professionals whose rates will drive up the cost. You will need at least:
  • Air conditioning contractor: he or she performs an assessment to determine what kind of system you need and installs it
  • Assistant(s): additional team that helps with the wiring, ductwork and metal bracket mounting
You will also be charged for the materials involved in the installation, including the air conditioning unit and chemicals. Check with your contractor to see whether you might cut costs by buying the air conditioning system yourself or using existing heating system ductwork in your home.

Additional Questions and Considerations

Do you already have a central heating system?

Many central air conditioning systems use the furnace blower to distribute cool air through the home. If you do not have a central heating system installed, it is cost-effective to install a heating and air conditioning (HVAC) system at the same time. If you already have central heat, you can use the existing fans and duct system for the central air system.

Do you need ductwork?

Although most new homes have ducts and vents already in place, many older homes have old convection heating systems or baseboard heaters without ductwork. In such cases, you will need to install ducts and vents to provide the air conditioning with a flow system. This would be the time to explore upgrading the existing heating system as well, as it will be much cheaper to do together.

How's the insulation in your home?

If your home is well built and well insulated, your heating and cooling systems will work more efficiently and save you money. If you have poor insulation, you will spend considerably more on utility bills. Explore the costs of new insulation or upgrading your old insulation as it might save you money in the long run.

Other Central Air Conditioning Facts

Need more information on air conditioning systems before you invest? While a cooling professional has all the know-how about these systems, here are some facts you should know going into the installation project.

BTUs and Air Conditioning Units

What is a British Thermal Unit? British Thermal Units or BTUs are defined as the amount of energy needed to cool or heat up one pound of water by a Fahrenheit. It's used to measure heating and air conditioning units in BTU/hour. Homeowners can determine what size air conditioner they need by following these steps:
  1. Figure out the square footage of the room. For a square room, multiple length by width. For a triangular room, it's length by width and divide by 2.
  2. There's a chart you can reference in stores that will tell you what size machine you will need. If you want a system for a whole house, it's a bit more complicated and will require professional assistance.
The rough estimates are as follows:
Area to be Cooled (sq. ft.)Capacity (BTUs per hour)
700 - 1,00018,000
1,000 - 1,20021,000
1,200 - 1,40023,000
1,400 - 1,50024,000
1,500 - 2,00030,000
2,000 - 2,50034,000

What is Single-Stage vs. Two-Stage Cooling?

There are two kinds of air conditioning systems to choose from -- single-stage and two-stage. Your climate will determine which stage is best for your home.

Single-stage air conditioners turn on at full capacity when your home's indoor temperature rises past the set level on your thermostat. It then turns off completely until your house rises past that temperature again and repeats the process. This is good for climates that don't fluctuate much in temperature. In hot, humid climates with pulsing solar rays, the air conditioner will turn on often to compensate for the heat outside. This will lead to a lot of loud noises and an increase in your utility bill.

Two-stage air conditioners function at two-thirds or complete capacity, depending on the home's internal temperature. When your house rises above the preset temperature, it will turn on at two-thirds capacity and work its way to full capacity. Then, it will come down from full capacity to two-thirds capacity and shut off. This saves power and cools your home at the same time. It also reduces noise and emits cleaner air, which makes it the more efficient option for most homeowners.

Tax Breaks

The government offers tax credits to incentivize homeowners to purchase energy-efficient home products. Energy-efficient air conditioning units must meet standards set by the Consortium for Energy Efficiency (CEE).

To qualify for a tax credit from the federal government, you must save the manufacturer's certificate from your central air conditioning system. The IRS won't require the certificate at the time you file your federal tax forms, but they recommend keeping it with your records in case you are audited. It proves that you purchased a qualifying product.

Tax credits are offered for:
  • Split-system air conditioners ($300) -- must have 16 SEER or 13 EER
  • Packaged air conditioners ($300) -- must have 14 SEER or 12 EER

Determining Air Conditioning Unit Quality

When installing your air conditioning unit, ask the following questions to ensure its quality and optimum performance for years to come:
  • Is it sized correctly? The equipment must be the right size to provide the best air conditioner performance for your home. That's why professionals measure your home and do load calculations.
  • Is the duct system right for the air conditioning unit? Ducts that are damaged, leaking or missing some spots will affect the performance of your air conditioner. Your air conditioning contractor will repair and install more ducts, if needed, so everything works at its highest caliber.
  • How is the airflow? Airflow must be just right; otherwise, you could see an increase in your bill or hot spots in rooms of your home. A contractor can measure the volume and adjust ducts or vents for optimal airflow.
  • What about the refrigerant? Refrigerant is what cools the air flowing through your home while its liquid is consumed into the HVAC system. If there isn't enough, it could result in more energy consumed and more moisture in the air. The HVAC professional will check the charge of the refrigerant and adjust it if needed.

Central Air Conditioning Warranties

Any newly installed air conditioning unit will come with a manufacturer's warranty. The warranty's length will vary depending on the manufacturer. Warranties generally last from five to 15 years; it's safe to expect an average length of 10 years. The manufacturer's warranty covers the equipment and parts in the machine.

There is also the contractor's warranty, which covers the labor for repairs and additional work such as encasing the air conditioner in protective metal, wiring it to the home and so on. Products with indoor air quality (IAQ) modifiers have a separate warranty that's less than that of an air conditioner, so keep that in mind when investing in such products.

You may also invest in an extended warranty, which can cover:
  • Cost of replacement parts
  • Additional years for repair costs by a third party (i.e., no out of pocket expenses)
  • Coverage by the manufacturer
Extended warranties are expensive and generally cost more than maintenance. There are also strict limitations on the warranty that will likely require paying for repairs upfront and following up repeatedly for the reimbursement. You may also end up paying for a system you have replaced in less than 10 years if you move out of the home or upgrade.

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Kathy Barnes 10 months ago
Helpful info - thank you. 
Our annual service, the technician wants to charge us $9000 for replacement for a very small house. This site helped us figure that we should talk to other service providers immediately before proceeding.
joan richardson 5 months ago
This page has been very helpful.  I feel much more able to make  a good decision about replacing my central air conditioning. 
Gilbert Radun 5 months ago
Our unit is 16 years old and we've had it checked out recently since it seems to be running excessively. Over all the tech says it is putting out well; it's the correct size, we have no shade and we've been having extreme heat with high humidity. The info you provided is very helpful and will help us make an informed decision when the time comes. Thank you so much.
Richard Carrillo 11 months ago
Installers often try to pawn off discontinued units as new
lena lakhman More than 1 year ago
informative and helpful
JACQUELINE P WHALUM More than 1 year ago
Lissa Perez More than 1 year ago

thank you for the cost break down of air condition systems. All the information I read will help me make the best decision for my home

Sharon Womack 23 days ago
Do your company work on churches?
Rodger Wheeler 30 days ago
Info was great.  I learned a lot in just a very few minutes.  Lots of things you forget to ask when they are telling you about the costs etc.
Joe Robbins 3 months ago
This information was very informative and it will help in my planning/budgeting for a new HVAC system in our home. Thanks!
Ricardo Rangel 3 months ago
Home was built in 2006 and ac outside blade is catching sometimes, and air is blowing inside but unit outside is not running.  From what I have been reading here I might need to replace my unit.  Wondering which unit brand would be a good one.  Thanks.
HELKANNYS MARIN 4 months ago

Neel Patil 4 months ago
My apartment is 1200 sf, I had Colman Unit installed in 2008. Now AC is not working, the technician is asking to replace it with Lennox 45000 BTU Furnace 80%, Lennox 2.5 ton coil, Lennox 2 ton 13 seer air conditioning. I live in Edison, NJ

Isn't it high in BTU for 1200 sf? Should it be 21000 or 23000?
Pat Hilberry 4 months ago
There seems to be a boatload of a/c mfg'er out there.  How do I determine who's my best fit without paying through the nose for a brand name instead of a good & reliable unit?
David OHEARN 4 months ago
will wait until Oct/ Nov when the cost is little less painful, lets put it this way, will need duct work, insulation replacement whole air system for our 1999
David OHEARN 4 months ago
this information is helpful and hopefully will make a decision by Oct /Nov, just beforeChristmas, when the cost is not to high in  replacing the whole air system, duct work and insulation will need some quotes to decide, thank you!
Michael Bastian 4 months ago
Carmen Brown 5 months ago
Gooood info. Thank you
Anthony Moore 5 months ago
We've heard two estimates so far: $10k and $14k, so I'm baffled by the price range given here (between $3,693 and $7,146). And we only want a unit to coll our upstairs! Not sure how to reconcile it, at all.
Willie F Bullock 5 months ago
Very helpful
Laxman Hegde 5 months ago
I am glad I read this
Shu-Jen CHEN 5 months ago
I am replacing a 3-ton unit. Will I be better off by purchasing the equipment myself then hire people to install?
Harley Justice 6 months ago
Thanks for the information. I will have to get estimates
Robert Keenan 6 months ago
Nice compendium of useful information. Thanks.
Daniel Diaz 6 months ago
This gave me a lot helpful information that I didn't know.
MARIA roldan 7 months ago
very helpful
Jesus Badal 7 months ago
This information was very helpful and will be very useful as I move forward with finding a contractor to install a new central air conditioning system in my home. Thank you!
Mariann J Walker 7 months ago
Very informative for me as this is my first install for central A/C.  
Thank you!
Maria Michel 8 months ago
Very helpful since i am in the process of deciding what way to go.
MOHAMMED HAMMAD 8 months ago
very helpful
I will add more comments after my project is done.
Thank you
Curtis Fulgham 8 months ago
Very good information to have when making this kind of investment.
Bruce Danford 9 months ago
I knew very little and this helped me immensely. I feel like I won't be completely lost when they come out to give a quote.
annagail Smith 9 months ago
Informative. Let me know we are probably paying about average for a new unit.
Samuel traylor 9 months ago
We need to replace our air andheat system our home is old build in 63 so every thing need to be replaced thanks for the advice.
Patrick Buckley 9 months ago

good basic info.  Thanks
Richard Barry 10 months ago
Thank you!
Ted Plaisance 10 months ago
very informative & helpful
Madeline Soccio More than 1 year ago
What if I have an exhaust duct system in my home, could we use them. 
David Chilcote More than 1 year ago
We are expecting a replacement for our air/heat conditioner as our home was built in 1998. We need some estimates (flexible) as we anticipate several $$$ thousand for replacement. We 80 years young and need some time to make increment payment in months and final payment in 2016.
Christopher Crossette More than 1 year ago
David I just read your post and notice you posted it 44 day ago. Have you visited with a Heating and Cooling Company yet on your project? Our company offers financing options to help you out with your project needs. Are you in the Kansas City area and still needing your heating and cooling replaced?

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