HVAC replacement costs in St Louis, MO, depend on a lot of factors, like unit type, size, and labor. See what you can expect to pay for HVAC replacement here.
How Much Does a Heat Pump Cost in St. Louis? [2026 Data]
Heating and air conditioning service costs depend on your project and location. Check with a local pro for your specific job.
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Highlights
The size of your home and the type of heat pump you want to install are the two most important cost factors to consider.
Air-source heat pumps are popular with St. Louis residents who have a central heating system, while mini-splits are more popular for those with baseboard heating.
Mini-splits are the most affordable type of heat pump, and they cost less than half what you’d pay for most other types.
The minimum heat pump efficiency allowed by law in Missouri is 14 SEER, but upgrading to a unit with a higher SEER rating can reduce utility costs.
Heat pump costs in St. Louis, Missouri, average $5,376, and most projects fall somewhere between $3,861 and $6,890. Your price will depend mostly on the capacity of the heat pump you need to heat and cool your home, as well as on the type of heat pump you install. Efficiency ratings and the need for ductwork can also play a role in your pricing.
Heat Pump Cost Factors
You could pay as little as $3,155 for a heat pump in St. Louis, and prices can rise as high as $9,800. There are a few things to consider to get an accurate estimate for your project.
Unit Capacity and Home Size
Your heat pump cost will depend largely on the size of your home. A heat pump’s output is rated in tons, and you’ll need a higher tonnage to heat and cool bigger interior spaces. Heat pumps with a higher output will cost more in materials, so the bigger your home is, the more you can expect to pay. The average home in St. Louis is just under 1,500 square feet, which means the most homes in the city require a 2.5-ton heat pump.
What is a heat pump?
Heat pumps both heat and cool your home and can be ducted or ductless. They work similarly to air conditioners, but heat pumps can reverse the cooling process and also warm your home.
You can use the table below to estimate your heat pump costs, but it’s always best to have a local HVAC pro size your system. They’ll consider other factors, like home age, home efficiency, and ceiling height, to get the most accurate size possible.
| Home Size (Sq. Ft.) | Capacity (Tons) | Cost Range |
|---|---|---|
| 1,000 | 2 | $3,100–$4,900 |
| 1,500 | 2.5 | $3,300–$5,100 |
| 2,000 | 3 | $3,400–$5,500 |
| 2,500 | 3.5 | $3,400–$5,600 |
| 3,000 | 4 | $3,500–$6,400 |
Type of Heat Pump
The type of heat pump you want installed will affect material costs and can play a major role in labor costs, as well.
Most existing heating systems in St. Louis are either central heating systems that use forced hot air or baseboard heating systems. Homes with forced hot air systems already have ductwork, so installing an air-source heat pump makes the most sense. These cost between $4,000 and $7,000. Since homes with baseboard heating don’t have ductwork, ductless mini-splits are more popular. Mini-splits in St. Louis cost between $1,100 and $7,000 to install.
Geothermal heat pumps are the most expensive because they require massive excavation to get the heating loop underground. You’ll pay as much as $17,600 for a geothermal heat pump in St. Louis.
| Type of Heat Pump | Cost Range | Pros | Cons |
|---|---|---|---|
| Air-source | $4,000–$7,000 | High efficiency | Requires ductwork |
| Geothermal | $5,300–$17,600 | Long lifespan | Most expensive |
| Hybrid | $2,200–$8,800 | Most reliable | Most maintenance |
| Mini-split | $1,100–$7,000 | Most affordable | Visible indoor units |
Efficiency
Heat pumps come with varying levels of efficiency, expressed as a SEER (seasonal energy efficiency ratio) rating or a more modern SEER2 rating. The higher the SEER rating, the more you’ll spend on your heat pump equipment, but your system will be more efficient and lower your heating and cooling costs.
In an area like St. Louis, which sees below-freezing temperatures for three months in the winter and highs above 90 degrees for five months in the summer, investing in a heat pump with a high SEER rating is wise. Ultimately, it will mean lower energy bills and less HVAC maintenance, which can help offset the up-front cost.
It’s important to note that the U.S. Department of Energy imposed new energy efficiency standards for heat pumps in 2023, so heat pumps in Missouri must have a minimum SEER rating of 14.
| SEER Rating | Cost Range |
|---|---|
| 14 | $1,400–$4,300 |
| 15 | $1,600–$5,200 |
| 16 | $2,100–$5,500 |
| 18 | $2,500–$5,900 |
| 20 | $3,200–$8,400 |
Duct Installation
More often than not, homeowners in St. Louis will opt for ductless mini-splits if they don’t already have ducts installed. Many will choose an air-source heat pump if they do already have ducts. However, if you have baseboard heat and don’t like the look of the indoor mini-split units mounted on your wall, you can opt to add ductwork installation, which will cost between $3,000 and $7,500, depending on the size of your home.
HVAC Pro Costs
When you hire an HVAC pro in St. Louis, Missouri, to install your heat pump, you can expect between $500 and $3,000 to go toward labor. Hourly rates for labor are just below the national average, thanks to the below-average cost of living in the city.
You should also budget for permits, which are required for all HVAC work. The City of St. Louis charges a $25 application fee plus $10 per $1,000 in project costs. For the average heat pump project in St. Louis, Missouri, you’re looking at a total permit fee of $85.
Does a Heat Pump Increase Home Value?
Installing a new heating system will almost always increase your home value, and the average return on investment (ROI) for the upgrade is 30%. Given the average cost of a heat pump in St. Louis, you can expect a value increase of over $1,600.
St. Louis sees some extreme temperatures in both the summer and the winter, so homeowners will often prioritize systems with a high efficiency since that means greater indoor comfort and lower heating and cooling costs. As such, you can maximize your return by choosing a heat pump with a high SEER rating.
How Angi Gets Its Cost Data
Home is the most important place on earth, which is why Angi has helped more than 150 million homeowners transform their houses into homes they adore. To help homeowners with their next project, Angi provides readers with the most accurate cost data and upholds strict editorial standards. We survey real Angi customers about their project costs to develop the pricing data you see, so you can make the best decisions for you and your home. We pair this data with research from reputable sources, including the U.S. Bureau of Labor Statistics, academic journals, market studies, and interviews with industry experts—all to ensure our prices reflect real-world projects.
Want to help us improve our cost data? Send us a recent project quote to [email protected]. Quotes and personal information will not be shared publicly.
Heating and air conditioning services reviews from real Angi homeowners in Saint Louis, MO
4.6★ avg. • 816 total reviews
- Lajuan J.
Generational TradesMan helped me fixed my condensing unit and furnace!! The prices were fair, and the team was very knowledgeable and respectful to my things
Generational Tradesman LLC - J L.
Got the job done right and saved us from a possible major heating/cooling issue before it got bad, so grateful for the kind professionals handling our problem so efficiently and properly!
Citi-Link Heating and Cooling - Jim Y.
I recently had a positive experience with Dunn Service regarding boiler issues, and I wanted to share my thoughts. The technician arrived promptly at the scheduled time and approached their tasks with expertise and precision, ensuring that all problems were thoroughly addressed. The pricing...
Dunn Heating Air Conditioning and Plumbing - Taylor M.
Daren was amazing! Iâ ve hired other companies to do work on my heating & cooling systems and they charge an arm and a leg to just show up. Finley was reasonable priced and was able to get up system up and running way faster than the big companies I hired previously! If you live in a condo...
- Mike K.
Terrible, heating and cooling system never fully functioned.
- Jessica G.
I didn't end up using Vasill, but wanted to leave a review anyway, because even though I went with another company, it was a very tough decision. Henry was very thorough, responsive, and friendly. He submitted a reasonable bid which came to me within a day or two. If anything falls through...
- Stanley V.
Service check and routine maintenance air-conditioning. This went great. Ryan explained what he was doing, was punctual and professional.
Air Comfort Service Inc - Siobhan S.
The company delayed their work 4 months (from December to March); asked us to move air conditioning units to accommodate their work, which we did; took our ~$10,000 deposit, and then closed. They did not do the work or return our ~$10,000 deposit.
The Foundation Doctor - Aj A.
Highly recommend this company! They were affordable, friendly, and quick cleaning all our air vents, registers, and dryer vent. They even offered recommendations to help us maintain the cleanliness and avoid future repairs / mold issues. Would absolutely recommend them to friends and hire...
Midwest Carpet and Duct Cleaning - Hanan M.
Great customer service and an expert in air conditioning installation. They were very professional.
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