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Written by
Kristen Cramer
April 29,
Fact-checked by
Tom Grupa
The average cost to install central air is $2,500 to $7,500, depending on the size (tons), brand, and efficiency rating (SEER). New central AC unit prices are $1,000 to $5,000, plus $1,000 to $2,500 for labor to install.
Average cost to install central air conditioning - chartCost to install central air Home size (square feet) AC unit tons Total cost installed 1,000 1.5 &#; 2 $2,000 &#; $5,500 1,200 2 &#; 2.5 $2,500 &#; $6,000 1,500 2.5 &#; 3 $2,700 &#; $6,500 1,600 3 &#; 3.5 $3,000 &#; $7,000 1,800 3 &#; 4 $3,000 &#; $7,500 2,000 3.5 &#; 4.5 $3,100 &#; $7,800 2,200 4 &#; 5 $3,500 &#; $8,000 2,500 4.5 &#; 5 $3,700 &#; $8,000 3,000 5+ $4,000 &#; $8,500Get free estimates from ac installation companies near you.
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The following table shows the average cost to install or replace a central AC unit, not including new ductwork.
Central air installation cost calculator National average cost $4,700 Minimum cost $1,100 Maximum cost $15,000 Average cost range $2,500 to $7,500* Cost data is from research and project costs reported by HomeGuide members.
AC units are sized in tons. One ton of cooling capacity equals 12,000 British Thermal Units (BTU). One ton of air conditioning cools 450 to 600 square feet on average, depending on the home's layout, insulation, and local climate.
Replacing a 3 to 5-ton AC unit costs $3,000 to $8,000 for a 1,500 to 2,500 square foot home.
AC unit cost by tons Tonnage BTUs AC unit prices AC cost installed 1.5 tons 18,000 BTU $1,000 &#; $3,800 $2,000 &#; $5,000 2 tons 24,000 BTU $1,200 &#; $4,000 $2,500 &#; $5,500 2.5 tons 30,000 BTU $1,500 &#; $4,500 $2,700 &#; $6,000 3 tons 36,000 BTU $1,700 &#; $5,000 $3,000 &#; $6,500 3.5 tons 42,000 BTU $1,800 &#; $5,200 $3,100 &#; $7,000 4 tons 48,000 BTU $2,000 &#; $5,500 $3,500 &#; $7,500 5 tons 60,000 BTU $2,500 &#; $6,000 $4,000 &#; $8,000 Outdoor AC unitInstalling central air conditioning for a 1,200 square foot house costs $2,500 to $6,000. Central air for a 2,000 square foot home costs $3,100 to $7,800+. Homes over 3,000 square feet may require two condenser units.
Central air conditioner prices are $1,000 to $8,500 for the unit alone, depending on the size, brand, and efficiency. Large systems with high SEER ratings or AC units from top brands cost the most.
Air conditioners have a Seasonal Energy Efficiency Ratio (SEER) rating of 13 to 26. AC units with a higher SEER rating cost more up front but are more efficient and reduce long-term energy costs.
Air conditioner prices by SEER rating SEER Efficiency AC unit prices Total cost installed 13 &#; 14 SEER Standard efficiency $1,000 &#; $4,200 $2,500 &#; $6,000 15 &#; 16 SEER High efficiency $1,500 &#; $5,700 $3,000 &#; $7,500 17 &#; 18 SEER High efficiency $1,800 &#; $6,100 $3,500 &#; $8,600 19 &#; 21 SEER Very high efficiency $2,500 &#; $7,500 $4,000 &#; $10,000 22 &#; 26 SEER Maximum efficiency $3,700 &#; $8,500 $6,000 &#; $11,000The Department of Energy mandates a minimum SEER of 14 in the northern U.S. and 14.5 to 15 in the southern U.S., depending on the AC system's size.
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Central AC unit prices by brand Brand SEER AC unit prices Total cost installed Aire-Flo 13 &#; 14 $1,000 &#; $2,000 $2,400 &#; $4,500 Amana 13 &#; 24 $1,300 &#; $4,500 $3,000 &#; $7,500 American Standard 13 &#; 20 $1,500 &#; $4,300 $3,800 &#; $8,000 Armstrong 13 &#; 20 $1,100 &#; $2,500 $3,000 &#; $4,600 Bryant 13 &#; 20 $1,400 &#; $3,500 $2,500 &#; $6,800 Carrier 13 &#; 24 $2,500 &#; $5,800 $4,700 &#; $8,700 Coleman 13 &#; 20 $1,300 &#; $3,500 $2,500 &#; $5,000 Comfortmaker 13 &#; 19 $1,300 &#; $3,000 $2,800 &#; $5,800 Frigidaire 13 &#; 20 $1,300 &#; $3,000 $2,500 &#; $4,800 Goodman 14 &#; 24 $1,200 &#; $3,000 $3,200 &#; $5,000 Heil 13 &#; 19 $1,400 &#; $3,000 $2,800 &#; $4,800 Lennox 13 &#; 26 $1,600 &#; $5,600 $5,300 &#; $9,000 Payne 13 &#; 17 $1,000 &#; $1,800 $2,500 &#; $3,900 Rheem / Ruud 13 &#; 20 $1,800 &#; $5,500 $3,600 &#; $8,500 Tempstar 13 &#; 19 $1,300 &#; $3,000 $2,600 &#; $5,200 Trane 14 &#; 22 $1,600 &#; $5,800 $4,000 &#; $9,000 York 13 &#; 21 $1,400 &#; $4,700 $3,500 &#; $8,000*No installation required.
Central air conditioning systems come in two types:
A split-system AC features an outdoor condenser unit containing the compressor and an indoor air handler cabinet containing the evaporator coil. Most homes in the U.S. have split systems.
A packaged air conditioner combines the condenser, compressor, and evaporator coil in a single outdoor cabinet. Packaged systems are typically used in commercial settings.
Central AC compressor come in three different types:
Single-stage air conditioners are the cheapest but have only one speed and run at full capacity until the indoor air reaches the set temperature.
Two-stage air conditioners have two speeds&#;full capacity and 60% to 70% capacity. Two-stage units run more quietly and efficiently but cost more than single-stage units.
Variable-speed air conditioners cost the most to install but operate at any capacity, making them more efficient, better at dehumidifying, and the least expensive to run.
Ductless mini-split AC installation costs $3,000 to $10,000 on average, depending on the number of zones, BTU size, SEER rating, and brand. A ductless AC system features an outdoor condenser that supports up to five indoor air handlers, also called "zones".
A window AC unit costs $300 to $1,100 with installation or $150 to $800 for the unit alone. Window air conditioner prices depend on the size, brand, efficiency, and features.
A portable AC unit costs $200 to $900 and does not require installation. A portable unit is freestanding and uses a hose to vent hot air outside through a window, wall, ceiling, or door.
The cost for HVAC replacement depends on whether the home has a furnace or heat pump:
The labor cost to install central air conditioning is $1,500 to $2,500 or more, depending on if it includes new ductwork. Labor makes up 40% to 60% of the total installation cost.
New AC unit cost to install - chartHome AC unit and system cost to install Factor Average cost New AC unit $1,000 &#; $5,000 Labor cost to install AC $1,500 &#; $2,500 Ductwork installation* $1,400 &#; $6,600 Total cost to install $2,500 &#; $14,100*May not be required.
The following factors affect the cost to install a central AC unit:
AC system size &#; AC units in larger ton sizes cost more.
Efficiency and SEER rating &#; High-efficiency models with higher SEER ratings cost more than standard efficiency units.
System type &#; Split systems typically cost less than packaged systems.
Location &#; Installing a condenser unit on the ground costs less than installing it on a rooftop.
Accessibility &#; Installation costs more for AC systems in difficult-to-access areas like attics and crawlspaces.
Zoning &#; Adding an HVAC zoning system costs $1,700 to $4,500. Large homes may benefit from a zoned system to minimize the required AC unit size and reduce energy costs.
A condenser pad costs $40 to $250, depending on if the pad is prefab composite or poured concrete.
Permits for AC replacement cost $100 to $250. Permits for new AC installations with ductwork cost $250 to $1,500. Contractors typically include permit fees in the estimate.
Removing an old air conditioner costs $50 to $200, depending on local disposal and Freon removal fees.
Tax credits & rebates &#; New AC units may qualify for tax credits and rebates. Check the Energy Star rebate finder and the Database of State Incentives for Renewables & Efficiency (DSIRE) for available incentives.
Adding air conditioning to an existing furnace costs $3,000 to $5,000, depending on the home size and the new AC unit's SEER rating. Adding central AC to a forced-air system may require other upgrades:
Sealing the ductwork to prevent leaks and improve efficiency
Upgrading the furnace blower to move enough cool air through the home
Replacing old supply registers with wider vent grilles to improve airflow
The average cost to install ductwork for central air is $2,400 to $6,600 when retrofitting a home without existing ducts. Replacing HVAC ductwork costs $1,400 to $5,600, depending on the home's size.
Cost to install ductwork for central air Install type Cost per linear foot Average cost New duct installation / retrofit $40 &#; $65 $2,400 &#; $6,600 Ductwork replacement $25 &#; $55 $1,400 &#; $5,600Ductwork repair costs $200 to $700 for minor jobs, depending on the duct size, accessibility, and service type.
Air duct cleaning costs $450 to $1,000 on average or $25 to $50 per vent.
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An air conditioner should be sized at 16 to 30 BTUs per square foot of living space. Hire a licensed HVAC contractor to perform a Manual J Load calculation and determine the home's ideal AC size.
A Manual J Load calculation considers factors like:
Zone, climate, and humidity
Square footage and number of stories
Home layout and ceiling height
Number, type, and placement of windows
Sun exposure or shade
Insulation amount and quality
Number of people in the home
Heat-generating appliances
Basement, slab, or crawlspace conditions
The following table shows the recommended AC size in tons based on the home's square footage and climate zone:
AC unit size calculator AC size Zone 1 Zone 2 Zone 3 Zone 4 Zone 5 1.5 Tons 600 &#; 900 sf 600 &#; 950 sf 600 &#; sf 700 &#; sf 700 &#; sf 2 Tons 900 &#; sf 950 &#; sf &#; sf &#; sf &#; sf 2.5 Tons &#; sf &#; sf &#; sf &#; sf &#; sf 3 Tons &#; sf &#; sf &#; sf &#; sf &#; sf 3.5 Tons &#; sf &#; sf &#; sf &#; sf &#; sf 4 Tons &#; sf &#; sf &#; sf &#; sf &#; sf 5 Tons &#; sf &#; sf &#; sf &#; sf &#; sfSino Air Conditioner supply professional and honest service.
Do not buy a cooling system that is too small or too large for the home:
An oversized AC will &#;short-cycle&#;, turning off and on more often. Short cycling uses more energy, prevents the AC from dehumidifying the home, and reduces the system&#;s lifespan.
An AC unit that is too small will run constantly, reducing efficiency and adding wear and tear.
Installing new central air conditioning increases a home's resale value by 2% to 10%, depending on the location. Central air is a good investment in warm climates but provides less value in regions with mild summer weather.
Replacing an existing central air system maintains but does not increase the home's value.
Installing a new high-efficiency AC unit with a high SEER rating provides a return on investment (ROI) of 70% to 85%.
The cost to run central air conditioning is $80 to $200 per month on average, depending on the AC unit's BTU size, SEER rating, and local utility rates.
Air conditioning cost to run AC type Monthly cost to run* Central air conditioning $80 &#; $200 Ductless mini-split AC $30 &#; $150 Window AC unit $12 &#; $120*Running 8 hours per day.
New AC units are 20% to 40% more energy-efficient than models more than 10 years old.
Look for ENERGY STAR-certified units, which have the highest efficiency rating.
Use a programmable thermostat to reduce energy costs.
An air conditioner lasts 12 to 15 years if correctly sized for the home and properly maintained. An AC unit's lifespan depends on the quality, environment, and usage. Improperly sized air conditioners or units located in areas with extreme heat typically have a shorter lifespan.
Warm air or limited airflow from the vents
Excessive humidity in the home
Moldy, musty, or smoky odors
Loud or unusual noises from the AC system
Increased utility and energy bills
AC is more than 10 years old
AC uses R-22 Freon
AC requires frequent repairs
The repair cost is at least 50% of the cost of a new AC.
The repair cost multiplied by the system's age in years exceeds $5,000.
An air conditioner warranty lasts 10 to 15 years if the product is registered within 60 days of installation. Coverage timeframes for individual parts vary from 5 to 20 years, depending on the brand. Standard AC warranties cover equipment malfunctions but typically do not cover labor.
An AC tune-up costs $70 to $200. Failing to perform regular AC maintenance may void the manufacturer's warranty.
Central AC installation takes 1 to 2 days on average if using the existing ductwork. AC installations requiring new ductwork take 3 to 5 days or more, depending on the home size and age, duct type, and crew size.
An air conditioner can cool but cannot heat. A heat pump can cool in the same way but can also reverse itself to provide heat instead when needed. Air conditioners are typically paired with a furnace to heat the home during cold months.
Before hiring an AC company near you, be sure to:
Get at least three estimates to compare.
Look for a NATE-certified company with experience installing central AC units.
Select an HVAC contractor who will perform a complete home evaluation to assess your cooling needs.
Read their reviews on HomeGuide and Google.
Select companies that are insured, bonded, and have been in business for 5+ years.
When comparing quotes, confirm they include equipment of the same size and quality.
Avoid selecting the lowest quote as quality may suffer.
Get a detailed estimate, contract, and warranty in writing before the work begins.
Never pay in full before the project starts. Follow a payment plan instead for work completed.
Are you licensed and insured to install an HVAC system?
How long have you been in business?
Is a central air or ductless mini-split system best for my needs?
What AC unit size or capacity do you recommend for my house?
What is the SEER rating of the AC unit you recommend for my house?
Can the existing ductwork be used with the new unit?
Will you inspect my existing ductwork for leaks, mold, and asbestos?
How much will it cost to remove my old AC unit?
What extra costs should I expect?
What upgrades are available for new AC units?
How much will I save on energy costs each month?
Which brands do you recommend and why?
Are there any local or federal rebates or tax credits available?
How long is the warranty, and what does it cover?
How long will it take to install the central air system?
What kind of maintenance will the system require?
Can I do any maintenance myself?
How long will the system last?
Are you aware of the benefits a rooftop air conditioning system provides? Do you want to enjoy maximum comfort in your home while also saving energy? If so, a rooftop AC unit could be the perfect solution.
Rooftop AC units are packaged systems with all components contained in a single unit. They are normally stationed on the rooftop of commercial buildings (though they can also be installed on a slab at ground level) to provide centralized cooling for the entire building. However, they have also become popular with homeowners who want to take advantage of their energy efficiency, quiet operation, and low cost.
(Rooftop AC Units can damage the roof if not installed and maintained properly. Please ask your roofing contractor about drainage from condensation and keeping your roofing membrane intact to avoid roof repair)
While air conditioners on roofs differ slightly from standard HVAC systems (traditional split systems), their main function remains the same. They provide cool air into a space and, in some cases, additional heating capabilities. They both use compressed refrigerant to cool air passing through special coils by means of expansion and contraction.
However, the notable difference lies in the self-contained design of rooftop cooling systems. Unlike standard HVAC systems, which consist of two separate units, air conditioner on roof systems incorporate all components into a single, self-contained unit. Gord from Comfort Wave has more to say about it&#;
This integrated design eliminates the need for an indoor unit (such as an air handler or furnace) and an outdoor unit (including the condenser and compressor). Instead, all the necessary components &#; compressor, evaporator, fan, and condenser &#; are housed within the rooftop unit.
This package unit design not only saves space but also streamlines the installation process. The consolidated configuration allows for efficient cooling performance while maximizing the use of available rooftop space. Below is a cooling cycle of how a rooftop AC system operates:
When you choose to install an HVAC unit on your roof, you can enjoy several significant benefits. Besides the space-saving feature and easy installation, you are also able to enjoy the following:
More efficient cooling performance: The elevated position of rooftop HVAC units enables better airflow and heat dissipation. With unobstructed access to fresh air, the system operates more efficiently, providing optimal cooling or heating performance throughout your home or building. This enhanced airflow contributes to maintaining consistent indoor temperatures.
Increased curb appeal: By placing the HVAC unit on the roof, it remains hidden from view, resulting in a cleaner and more organized appearance. Unlike other types of air conditioning systems, which may have visible indoor or outdoor units, a rooftop HVAC unit keeps the equipment discreetly out of sight. This contributes to the overall aesthetic appeal of your home or building.
Saves space: In addition to the visual and acoustic advantages, installing an air conditioner on the roof maximizes the use of available space. By utilizing the rooftop for installation, valuable indoor space is freed up, which can be particularly advantageous for buildings with limited square footage.
Less noise: The &#;out of sight&#; aspect also applies to noise levels. Rooftop HVAC units tend to operate quietly, especially when properly installed and well-maintained. With the main components situated on the roof, any operational noise is isolated, ensuring a peaceful indoor environment.
Reduced risk: By keeping the unit elevated and away from ground-level hazards, it is less susceptible to accidental impacts, vandalism, or other potential damage. This helps to preserve the integrity and functionality of the system, providing peace of mind and avoiding costly repairs or replacements.
Easy access and maintenance: Rooftop HVAC units offer easier accessibility for maintenance and repairs. Service technicians can conveniently reach the unit without entering the living or working spaces, minimizing disruptions for occupants.
Rooftop AC units may not be suitable for everyone, and their compatibility with different types of roofs can vary. Weigh the pros and cons carefully before making a final decision.
Potential rooftop damage: The installation of a rooftop air conditioner requires structural modifications and may involve penetration of the roof for proper installation and connection. While professional installers take precautions to minimize potential damage, there is still a risk of leaks or structural issues if not properly addressed.
Installation complexity: Installing a rooftop air conditioner can be more complex and labor-intensive compared to other types of air conditioning systems. The process typically involves lifting heavy equipment onto the roof, ensuring proper anchoring and sealing, and connecting the unit to the necessary electrical and ductwork systems.
Storm Damage: Though rare, air conditioners on roof units remain vulnerable to storm damage caused by factors like lightning strikes, strong winds, and other weather-related hazards.
Higher installation costs: Due to the complexity of the unit and the labor involved, a new unit can cost an average of $5,900 but can be significantly more, with prices reaching as high as $11,000.
Like any major home improvement decision, installing an AC unit on your roof requires careful consideration. There are several factors to evaluate before moving forward with the installation process. Therefore, to determine the suitability of this type of air conditioning system, consider the following factors:
Yard or roof space availability: For optimal performance, condenser units rely on a flat surface that leaves plenty of space around the unit for adequate air circulation. Such conditions may be present in the yard, but if not, the roof may be an ideal location for installation.
Rooftop weight limit: Confirm that your roof can support the added weight of the unit and its components before proceeding with the installation. Their weight can cause damage to the roof&#;s membrane if the structure cannot handle the additional load.
Weather conditions: Intense heat can put a strain on the unit, necessitating regular inspections and servicing to prevent overheating or damage. Likewise, storms and inclement weather can pose risks to rooftop installations, such as lightning strikes or high winds, which may require additional safeguards and maintenance measures.
Ease of maintenance: Having your rooftop AC unit easily accessible means you can promptly notice if vents are obstructed by leaves and debris. You can also detect leaks or identify subtle sounds that may indicate underlying issues. Conversely, with a rooftop unit, such concerns can easily go unnoticed, potentially leading to complications if they are only addressed during seasonal or annual maintenance checks.
As we mentioned before, when it comes to a rooftop AC unit and HVAC systems on the roof, the initial cost of installation can be quite high. The exact figure will depend on factors such as size, transport, contractor rates, etc. Generally speaking, however, you should expect to invest at least $3,800 to $5,500 for a basic setup with one condenser and about 4 to 6 supply grills. In some cases, the cost can go up to as much as $8,000 and beyond.
Ultimately, you will need to figure out the best solution for cooling your home that suits your budget. Investing in a rooftop AC unit can be an expensive and complex endeavor, but it is generally considered to be a good option for larger homes where central air conditioning may not be an option. If you do decide to go down this route, make sure to consult with a professional who can help you in selecting the right size unit and provide guidance on the installation process.
If you are looking for more details, kindly visit Rooftop Parking Air Conditioners.