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Last Updated: February 25, 2025
On average, 55% of the energy used in American homes is for heating and cooling, according to the Department of Energy. With the higher cost of living in Thornton, you're probably eager to reduce your energy bills.
Our list of the top HVAC companies in Thornton can help you get your system into top shape, allowing you to keep comfortable while saving money.

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

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

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

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

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

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

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

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

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

Our Rating
User Rating
Informative resources
Prompt service delivery
Clear pricing policy
Free quotes
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:
If your home's HVAC system is malfunctioning or suffering from a lot of wear and tear, you may need to hire an HVAC contractor for maintenance or replacement. Watch for these common signs that your system needs expert attention:
If you notice any of the above, it's wise to have a local HVAC technician inspect your system. They can pinpoint problems and determine whether repair or full HVAC replacement is required.
What you pay for HVAC installation or maintenance is determined by your system type. Common HVAC unit styles include the following:
The price of HVAC maintenance also varies depending on the kind of work being done. HVAC systems are complicated and can require different kinds of maintenance. The cost of some common repairs is as follows:
| HVAC Unit Type | Cost | |
|---|---|---|
| Split | $1,939-$4,943 | |
| Hybrid Split | $3,929-$7,238 | |
| Heat Pump | $3,042-$30,996 | |
| Packaged Heating and Air | $255-$424 |
Essential HVAC maintenance is important, but can be expensive. Fortunately, homeowners can take steps to reduce wear and tear on their system and lower future maintenance needs.
| Service | Cost | |
|---|---|---|
| Filter Replacement | $64-$170 | |
| Condensor Cleaning | $1,273-$3,818 | |
| Thermostat Repair | $85-$212 | |
| Ductwork Cleaning | $407-$1,018 |
Knowing what makes a trustworthy HVAC company is vital for an easy installation or repair. An experienced, credentialed HVAC contractor gives you confidence your system can provide consistent heating and air conditioning year-round.
Contact at least three HVAC providers for quotes. Describe the issues and have specialists visit to inspect your system if possible. Compare the providers' explanations, solutions, estimated costs, timeframes, and warranties. Avoid companies that pressure you or demand payment upfront.
Choose an HVAC company with skilled technicians who have proper licensing and experience. HVAC contractors in all states have federal requirements set by the Environmental Protection Agency (EPA). To obtain the EPA Section 608 Technician Certification, an individual must pass an exam (the type of exam depends on what kind of equipment they intend 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 on a state-by-state basis.
There are no state-level licensing requirements for HVAC technicians in Colorado; however, those who operate an HVAC business are required to have a Colorado business license, plus insurance. It's a good idea to check with your municipal government to determine if there are any local licensing requirements for HVAC contractors. Additionally, contractors that do plumbing or electrical work in addition to HVAC work must register with the State Plumbing Board or the Colorado Electrical Board, respectively. You should also look at reviews and complaints on sites like the Better Business Bureau (BBB), Google Reviews, and Yelp. Choose a company with positive reviews and reports of great customer experiences.
Make sure you understand the details of any project before it begins. If HVAC repairs are required, have your provider list which parts require replacement and why. Confirm that your technician will clean and test the system after the repair to verify that everything works. When replacing your HVAC, ask the provider to explain the new energy efficiency, model, features, brand, and estimated installation time. Before signing a contract, make sure you understand how your provider will determine the right system size for your home and what the price will be.
Good HVAC companies offer warranties on service and equipment installations. The more complete the coverage, the better. Compare warranty details between companies and pick the one that offers the most comprehensive protection within your budget.
Get a written proposal before HVAC work begins. A comprehensive quote includes both labor and material costs. Make sure you understand and agree to all terms before signing the contract.
You should have your HVAC system inspected twice a year. Following an inspection, your technician will tell you what services are needed. You should also schedule an inspection if you notice new issues such as leaks, strange noises, or unusual smells. If your system has ductwork, you should have it inspected every few years.
Usually, it's best to schedule inspections in the spring and fall, as these times tend to be less busy. This also helps get your system ready for the summer and winter, when it probably sees the most use.
You can save energy throughout the year by reducing the amount of work it takes for your HVAC system to maintain your home's temperature. During all seasons, keep your thermostat as close to the outside temperature as possible, and try to adjust it only a few degrees at a time. You could also consider getting a smart thermostat.
Generally, whole-system HVAC installation or replacement takes one to three days. Installing or replacing a furnace or air conditioning unit can take as little as half a day or as much as two days. The exact amount of time will be based on factors like how large your home is, how easily accessible different parts of the system are, and whether your technician runs into any problems.
For a 2,000-square-foot home, you'll want 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 look for an air conditioning unit with around 2.5 to 5 tons of capacity. Typically, 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 provide financing options via a third-party lender, or you might choose to obtain your own loan. It's a good idea to discuss payment options with your HVAC company and a financial advisor to make sure that you're choosing the best option for you.
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