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Last Updated: February 25, 2025
According to the Department of Energy, approximately 55% of energy use in American homes goes toward heating and cooling. Since cooling and heating represent such a significant chunk of your utility bills, you'll want to ensure that the HVAC system in your Maryville home is functioning optimally.
We've compiled this guide to the top HVAC companies in Maryville to help you choose the best person for your job and get your system into top shape.

Our Rating
User Rating
Informative resources
Reliable customer support
Prompt service delivery
Clear pricing policy
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Services Offered

Our Rating
User Rating
Informative resources
Reliable customer support
Prompt service delivery
Free quotes
Clear pricing policy
Services Offered

Our Rating
User Rating
Informative resources
Reliable customer support
Services Offered

Our Rating
User Rating
Reliable customer support
Informative resources
Free quotes
Prompt service delivery
Clear pricing policy
Services Offered

Our Rating
User Rating
Prompt service delivery
Free quotes
Informative resources
Services Offered

Our Rating
User Rating
Clear pricing policy
Informative resources
Reliable customer support
Services Offered

Our Rating
User Rating
Free quotes
Reliable customer support
Informative resources
Clear pricing policy
Services Offered

Our Rating
User Rating
Free quotes
Informative resources
Clear pricing policy
Reliable customer support
Services Offered

Our Rating
User Rating
Informative resources
Reliable customer support
Free quotes
Services Offered

Our Rating
User Rating
Informative resources
Reliable customer support
Free quotes
Clear pricing policy
Services Offered
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:
An HVAC system that's malfunctioning or outdated likely needs professional attention for repairs or replacement. Watch for these signs that your system needs service:
If you notice any of the above, it's wise to have a local HVAC technician inspect your system. They can diagnose problems and let you know whether repair or full HVAC replacement is the better solution.
What you pay for HVAC installation or maintenance depends on your system type. Common HVAC unit styles include the following:
The amount you spend on HVAC maintenance also varies depending on the kind of work being done. HVAC systems are complicated and might require different kinds of maintenance. The prices of some common jobs are as follows:
| HVAC Unit Type | Cost | |
|---|---|---|
| Split | $1,881-$4,796 | |
| Hybrid Split | $3,812-$7,023 | |
| Heat Pump | $2,951-$30,074 | |
| Packaged Heating and Air | $247-$412 |
Fixing your HVAC by repairing or replacing parts when needed is important, but can be expensive. Thankfully, there are steps you can take to minimize wear and tear over time on your system.
| Service | Cost | |
|---|---|---|
| Filter Replacement | $62-$165 | |
| Condensor Cleaning | $1,235-$3,705 | |
| Thermostat Repair | $82-$206 | |
| Ductwork Cleaning | $395-$988 |
Knowing what to look for in an HVAC company is important for a successful project. Look for an experienced, licensed contractor that can offer you peace of mind and make sure your system provides reliable air conditioning and heating for your home.
Request estimates from three or more HVAC contractors. Explain your issues and ask if technicians can inspect your system in person. Compare each company's diagnoses, recommended solutions, estimated cost, warranties, and timeline. Avoid companies that pressure you or demand payment before work.
It's important to choose an HVAC company that employs technicians with the appropriate qualifications and expertise. HVAC contractors in all states have federal requirements from the Environmental Protection Agency (EPA). To obtain the EPA Section 608 Technician Certification, individuals must pass an exam (the type of exam depends on the kind of equipment they plan to work with). Section 608 certification is required for all technicians who "maintain, service, repair or dispose of equipment that could release refrigerants into the atmosphere." All other licensing requirements are handled at the state level.
Illinois doesn't have state-level contractor licensing requirements. However, there may be local regulations, so make sure to check with your municipal government to verify that your contractor meets all of the requirements. You can also verify an Illinois business license on the Secretary of State's website. You should also check a company's reviews and complaints on sites such as the Better Business Bureau (BBB), Yelp, and Google Reviews. Pick a company with great feedback and good customer testimonials.
Make sure you know the details of any project before it begins. If HVAC repairs are required, have your provider detail which parts require replacement and why. Confirm that your technician will clean and test the entire system after the repair to verify that everything works. When replacing your HVAC system, ask the contractor to describe the new estimated installation time, brand, energy efficiency, model, and features. Before work starts, ask how your provider plans to accurately size the unit for your home and how much it will cost.
Reliable HVAC companies provide warranties for their services. The broader the coverage, the better, so make sure to compare warranties between providers. Choose the one that offers the best coverage at a fair cost.
Always get HVAC bids in writing before work begins. A comprehensive quote will cover costs for both labor and materials. Ensure that you agree to all terms before signing the contract.
Normally, your HVAC system should be inspected twice a year. After an inspection, your technician will tell you what, if any, services are required. You should also have an inspection if you notice any new issues, such as unusual smells, leaks, or strange noises. If you have ductwork in your home, it should be serviced every few years.
The best times to have your HVAC system inspected are the spring and fall. Technicians tend to be less busy during these times, so it will be easier to get an appointment. This also ensures that your system is ready for the summer and winter, which is when it normally sees 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. During all seasons, keep your thermostat as close to the outside temperature as is comfortable, and avoid making drastic changes — adjust it only a few degrees at once. You could also consider getting a smart thermostat.
Generally, whole-system HVAC installation or replacement takes between one and three days. Installing or replacing a furnace or air conditioning unit may take anywhere from a few hours up to two days. The exact amount of time will vary depending on things like the size of your home, how easily accessible different parts of the system are, and whether your technician runs into any problems.
Usually, HVAC financing is through a third-party lender. If your HVAC company doesn't offer these options, you could consider taking out a loan on your own. Be sure to talk to your HVAC company and a financial advisor to determine what options are available and appropriate for your situation.
There are several ways you can make your HVAC system more energy-efficient:
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