10 Best HVAC Companies in St. Louis, MO

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Last Updated: February 25, 2025

On average, 55% of energy use in American homes goes toward heating and cooling, according to the Department of Energy. Energy costs in St. Louis are often higher than in other places, meaning that you'd probably like to save money on your bill.

The right HVAC contractor can get your system into shape for a reasonable price, letting you keep your home comfortable while still saving money. That's why we've put together this guide to the best HVAC companies in St. Louis.

Top 10 Best HVAC Companies in St. Louis

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SmartHouse Heating and Cooling

SmartHouse Heating and Cooling Logo

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User Rating

6921 Olive Blvd, St. Louis, MO 63130 (314) 451-5391 callsmarthouse.com

Reliable customer support

Informative resources

Free quotes

Clear pricing policy

Prompt service delivery

Services Offered

Emergency services
Ac repair
Boiler installation
Furnace repair
Ac installation
Ductless
Filtration
Radiant heating
Indoor air quality
Furnace installation
Maintenance
Inspection
Smart home integration

B & W Heating & Cooling

B & W Heating & Cooling Logo

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User Rating

398 E Edwardsville Rd, Wood River, IL 62095 (618) 936-0361 bwheatcool.com

Prompt service delivery

Clear pricing policy

Informative resources

Free quotes

Reliable customer support

Services Offered

Boiler installation
Boiler repair
Ductless
Ac installation
Duct cleaning
Filtration
Furnace installation
Indoor air quality
Ventilation
Maintenance
Ac repair
Zoning systems
Emergency services

Academy Air Heating, Cooling, Plumbing and Electric

Academy Air Heating, Cooling, Plumbing and Electric Logo

Our Rating

User Rating

924 Jeffco Executive Dr, Imperial, MO 63052 (314) 370-6074 academyair.com

Reliable customer support

Informative resources

Services Offered

Filtration
Duct cleaning
Ac installation
Indoor air quality
Boiler installation
Furnace installation
Maintenance
Emergency services
Boiler repair
Ac repair
Ductless
Furnace repair

Vitt Heating & Cooling

Vitt Heating & Cooling Logo

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User Rating

4719 Morgan Ford Rd, St. Louis, MO 63116 (314) 347-3389 vittheating.com

Prompt service delivery

Informative resources

Free quotes

Services Offered

Ac repair
Indoor air quality
Filtration
Duct cleaning
Maintenance
Ac installation
Furnace installation
Ductless
Boiler installation
Inspection
Furnace repair
Boiler repair

Polar Aire Plumbing, Heating & Air Conditioning

Polar Aire Plumbing, Heating & Air Conditioning Logo

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User Rating

2227 Vandalia St, Collinsville, IL 62234 (618) 772-7007 callpolaraire.com

Prompt service delivery

Informative resources

Reliable customer support

Clear pricing policy

Free quotes

Services Offered

Ac repair
Indoor air quality
Ac installation
Inspection
Furnace repair
Boiler installation
Boiler repair
Ductless
Emergency services
Furnace installation
Maintenance

Averill Heating & Air Conditioning

Averill Heating & Air Conditioning Logo

Our Rating

User Rating

10645 Liberty Ave, St. Louis, MO 63132 (314) 427-3825 averillheatcool.com

Informative resources

Reliable customer support

Free quotes

Clear pricing policy

Services Offered

Boiler installation
Ac installation
Ac repair
Maintenance
Furnace repair
Ductless
Inspection
Indoor air quality
Furnace installation
Emergency services
Boiler repair

All Air Systems Heating & Cooling

All Air Systems Heating & Cooling Logo

Our Rating

User Rating

111 Prospect Ave # 103, Kirkwood, MO 63122 (314) 966-5600 callallair.com

Free quotes

Reliable customer support

Informative resources

Clear pricing policy

Services Offered

Ductless
Emergency services
Maintenance
Inspection
Boiler installation
Ac repair
Indoor air quality
Ac installation
Furnace installation
Furnace repair
Boiler repair

B & B Heating & Cooling

B & B Heating & Cooling Logo

Our Rating

User Rating

1955 Washington St, Florissant, MO 63033 (314) 838-9800 bbheatingcooling.com

Clear pricing policy

Informative resources

Reliable customer support

Services Offered

Boiler installation
Emergency services
Ac installation
Ductless
Ac repair
Maintenance
Indoor air quality
Ventilation
Furnace repair
Furnace installation
Filtration
Zoning systems
Inspection

Vogel Heating & Cooling

Vogel Heating & Cooling Logo

Our Rating

User Rating

1642 Manufacturers Dr, Fenton, MO 63026 (314) 408-6068 vogelheating.com

Informative resources

Free quotes

Reliable customer support

Services Offered

Boiler repair
Zoning systems
Furnace installation
Filtration
Duct cleaning
Indoor air quality
Ductless
Ac installation
Ac repair
Emergency services
Maintenance
Boiler installation
Furnace repair

Faszold Heating and Cooling

Faszold Heating and Cooling Logo

Our Rating

User Rating

1613 E Terra Ln, O'Fallon, MO 63366 (636) 735-7842 faszold.com

Free quotes

Clear pricing policy

Informative resources

Reliable customer support

Services Offered

Filtration
Ac repair
Ductless
Boiler installation
Ac installation
Maintenance
Furnace repair
Ventilation
Indoor air quality
Furnace installation
Inspection
Emergency services
Today's Homeowner Ranking Methodology

Today's Homeowner looks at dozens of datapoints on hvac companies to come up with our data-driven rankings. It's not possible for a company to pay for preferential treatment in our rankings. We look at the following key factors in determining who should top our list:

  • Company Experience
  • Real User Reviews
  • Company Reputation
  • Accreditations and Licenses
  • Service Area
  • Customer Service
Have questions about our methodology or company ratings? Reach out to FindAPro@TodaysHomeowner.com.

Signs You May Need HVAC Repair or Replacement

If your HVAC system is faulty or getting old, it likely needs repairs or replacement from an HVAC company. Watch for these signs your system needs service:

  • Refrigerant leaks
  • Strange noises when the system turns on
  • Frequent breakdowns and need for repairs
  • Temperature control issues or thermostat malfunctions
  • Poor air circulation or uneven heating/cooling
  • Unusually high energy bills
  • Corrosion, rust, or cracking
  • An HVAC system that's over 15 years old

If you're experiencing any of these HVAC issues, you should have a technician inspect your system. A local professional can diagnose problems and decide whether repairing or getting a new HVAC unit is the correct solution.

Cost of HVAC Installation and Maintenance in St. Louis

What you spend on HVAC installation or maintenance varies based on your system style. Common HVAC unit styles include the following:

  • Split or mini-split: Homes without ductwork for centralized climate control often have split or mini-split HVAC systems. These systems consist of interior units in each room to regulate temperature. These indoor units connect to an outdoor unit.
  • Hybrid split: A hybrid split HVAC system functions comparably to a regular split system. It provides flexibility by providing the option to use either electricity or gas for energy.
  • Heat pump: Heat pumps transfer hot and cool air between your home and the outdoors. They don't make their own heat or AC, so they perform best in temperate climates.
  • Packaged heating and air: Packaged HVAC systems are a smart choice for smaller homes. These systems have a single combined AC and heating, typically located in a basement or attic. They're small, cost-effective, and easy to maintain.

HVAC maintenance prices differ based on the specific services required. HVAC systems can be complex and potentially require a number of services. Price ranges for typical jobs are as follows:

HVAC Unit TypeCost
Split$1,973-$5,030
Hybrid Split$3,998-$7,366
Heat Pump$3,096-$31,544
Packaged Heating and Air$259-$432

Ways to Save Money on HVAC Costs

It’s important to complete repairs or full-system HVAC replacements as needed, though they can be expensive. The good news is that homeowners have methods to decrease the effect of wear and tear and reduce the frequency of breakdowns.

  • Keep your system clean. Cleaning your condenser fan blades, grills, indoor evaporator coil, and ductwork regularly helps your HVAC system work efficiently and lowers the risk of mold growth. The National Air Duct Cleaners Association recommends cleaning your HVAC system when it begins to look dirty.
  • Monitor for potential problems. Keeping a close eye on the efficiency of your HVAC system — for instance by checking your thermostat settings and energy bills — helps you find and solve issues before they get out of hand.
  • Change filters regularly. Replacing or cleaning your air filters every 1–3 months helps air flow efficiently through your system. You should also try to keep debris away from the outdoor portions of your HVAC system as much as possible.
  • Change the position of your blinds seasonally. Leaving your blinds open during the winter helps warm your home with passive solar heating. Closing the blinds during the summer helps prevent the same heat from getting inside. Doing both helps reduce the demand on your HVAC.
ServiceCost
Filter Replacement$65-$173
Condensor Cleaning$1,295-$3,886
Thermostat Repair$86-$216
Ductwork Cleaning$414-$1,036

How To Choose a Local HVAC Company

Knowing the right things to look for in an HVAC company is key for a smooth repair or installation. Established providers with certified technicians can offer assurance your HVAC system will deliver consistent coolig and heating year-round.

Compare Multiple Bids

Contact at least three HVAC providers for quotes. Explain the issues and have specialists visit to inspect your system if possible. Compare the contractors' explanations, solutions, estimated costs, timeframes, and warranties. Avoid companies that pressure you or demand payment upfront.

Check Credentials

Look for an HVAC company that employs qualified technicians with the necessary licensure and training. In all states, HVAC contractors need to obtain a Section 608 Technician Certification from the Environmental Protection Agency (EPA). This certification is required for all technicians who "maintain, service, repair or dispose of equipment that could release refrigerants into the atmosphere." Contractors must pass an exam (the type of exam depends on the type of equipment they intend to work with) to be certified by the EPA. All other licensing requirements are handled at the state level.

Missouri doesn't have state-level licensing requirements for HVAC contractors; however, most municipalities have local requirements. It's always a good idea to check with your local government to understand requirements for licenses such as HVAC Contractor or HVAC Journeyman Contractor. You can also confirm that a company holds a valid business license. You should also look at reviews and complaints on sites like Google Reviews, Yelp, and the Better Business Bureau (BBB). Pick a company with positive reviews and testimonials about great customer experiences.

Understand Work Details

Always make sure you understand the details of any project. For HVAC repairs, your provider should specify which parts require replacement and why. Confirm that your technician will clean and test your system after repairs are finished to ensure that it’s working properly. When replacing your HVAC system, ask the contractor to provide details on the new energy efficiency, model, brand, features, and estimated installation time. Before signing a contract, make sure you understand how your provider will properly size the new unit for your home and what the cost will be.

Compare Warranties

Trustworthy HVAC companies stand behind their work with warranties. Compare warranties from different companies, keeping in mind that broader coverage is better. Look for the provider that offers the most coverage for a reasonable price.

Get Quote in Writing

Get a written estimate before HVAC work starts. A comprehensive quote includes both labor and material costs. Make sure you understand and accept all terms before signing the contract.

Frequently Asked Questions About HVAC in St. Louis, MO

Generally, you should have your HVAC system inspected twice a year. After an inspection, your HVAC technician will tell you what services are needed. You should also call a technician if you notice any new issues, like unusual smells, strange noises, or leaks. If your home has ductwork, it should be serviced every few years.

The best times to have your HVAC system inspected are during the spring and fall. Technicians tend to be less busy during these times, which makes it easier to get an appointment. This also helps get your system ready for the summer and winter, the times of the year when it gets the most use.

You can save energy throughout the year by making it easier for your HVAC system to maintain the temperature of your home. Always keep your thermostat as close to the outside temperature as you can, and try to adjust it only a few degrees at once. You might also consider installing a smart thermostat.

For a 2,000-square-foot home, you should look for a furnace that's between 50,000 and 80,000 BTUs (British thermal units).

For a 2,000-square-foot home, you'll also want to purchase an air conditioning unit with between 2.5 and 5 tons of capacity. Usually, if your home is larger than 1,000 square feet, central air will be more effective than window air conditioning units.

Your HVAC company may have financing options via a third-party lender, or you might choose to obtain a loan on your own. It's a good idea to discuss payment options with a financial advisor and your HVAC company to make sure that you find the best option for you.

There are a number of ways you can make your HVAC system more energy-efficient:

  • Keep your air ducts clean and change or clean your air filters on a regular basis.
  • Schedule regular inspections to take care of issues as they come up.
  • Keep your attic well-ventilated and make sure all doors and windows are well-sealed.
  • Install a smart thermostat. If you don't want to or can't buy one, try keeping your inside temperature as close to the outside temperature as you can.
  • When replacing part of your system, see if there are Energy Star-certified or similar environmentally friendly options.

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