10 Best HVAC Companies in Thornton, CO

Give us a call now for an immediate match with a local pro.

Click to Call(833) 824-3371

(833) 824-3371

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.

Top 10 Best HVAC Companies in Thornton

Advertisement This site receives compensation from some of the companies featured in this listing, which may impact where and how products appear. When you click "Get Quote," you will be connected with partners who may contact you with information related to your inquiry. This listing doesn't feature all companies, products, or offers that may be available.

KJ Thomas Mechanical

KJ Thomas Mechanical Logo

Our Rating

User Rating

6175 Trevarton Dr, Longmont, CO 80503 (303) 435-8141 kjthomasmechanical.com

Prompt service delivery

Informative resources

Reliable customer support

Free quotes

Clear pricing policy

Services Offered

Boiler installation
Filtration
Radiant heating
Ductless
Furnace installation
Ventilation
Ac installation
Inspection
Duct cleaning
Maintenance
Boiler repair
Indoor air quality
Smart home integration
Furnace repair

Sanders and Johnson Heating and Cooling

Sanders and Johnson Heating and Cooling Logo

Our Rating

User Rating

7100 Broadway #7K, Denver, CO 80221 (720) 594-2176 sandersandjohnson.com

Reliable customer support

Free quotes

Clear pricing policy

Informative resources

Prompt service delivery

Services Offered

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

Controlling Systems

Controlling Systems Logo

Our Rating

User Rating

7000 N Broadway #1-106, Denver, CO 80221 (720) 445-8906 controllingsystemsco.com

Free quotes

Prompt service delivery

Informative resources

Clear pricing policy

Services Offered

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

MileHi HVAC Contractor Denver

MileHi HVAC Contractor Denver Logo

Our Rating

User Rating

4885 S Broadway, Englewood, CO 80113 (720) 770-0055 milehihvac.com

Clear pricing policy

Free quotes

Informative resources

Reliable customer support

Services Offered

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

Now Heating and Air

Now Heating and Air Logo

Our Rating

User Rating

8661 Rosemary St, Commerce City, CO 80022 (303) 287-8000 nowha.com

Informative resources

Reliable customer support

Clear pricing policy

Free quotes

Prompt service delivery

Services Offered

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

Elkhorn Heating & Air Conditioning, Inc./Elkhorn Electric, Inc.

Elkhorn Heating & Air Conditioning, Inc./Elkhorn Electric, Inc. Logo

Our Rating

User Rating

3869 Norwood Dr #9, Littleton, CO 80125 (720) 615-0098 myelkhorn.com

Free quotes

Prompt service delivery

Informative resources

Reliable customer support

Clear pricing policy

Services Offered

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

Steel T

Steel T Logo

Our Rating

User Rating

2750 S Shoshone St, Englewood, CO 80110 (303) 761-9276 steelt.com

Reliable customer support

Informative resources

Clear pricing policy

Free quotes

Prompt service delivery

Services Offered

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

D.N.I. Heating-Cooling-Refrigeration-Plumbing

D.N.I. Heating-Cooling-Refrigeration-Plumbing Logo

Our Rating

User Rating

14196 Co Rd 7, Mead, CO 80542 (720) 868-5291 dniheating.com

Informative resources

Reliable customer support

Free quotes

Clear pricing policy

Services Offered

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

WireNut Home Services

WireNut Home Services Logo

Our Rating

User Rating

4901 E Dry Creek Rd Suite 290, Centennial, CO 80122 (303) 731-1966 thewirenut.com

Clear pricing policy

Free quotes

Reliable customer support

Informative resources

Services Offered

Filtration
Duct cleaning
Boiler installation
Ac repair
Boiler repair
Furnace installation
Furnace repair
Inspection
Emergency services
Ac installation
Ductless
Maintenance

Grand Home Services, LLC

Grand Home Services, LLC Logo

Our Rating

User Rating

4267 S Argonne St, Aurora, CO 80013 (720) 365-1187 grandhomeservicesllc.com

Informative resources

Prompt service delivery

Clear pricing policy

Free quotes

Services Offered

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

  • Uneven heating/cooling or poor air circulation
  • Rust, corrosion, or cracking
  • Strange noises when the system turns on
  • Frequent breakdowns and need for repairs
  • Temperature control issues or thermostat malfunctions
  • Higher than normal energy bills
  • Refrigerant leaks
  • An HVAC system that's over 15 years old

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.

Cost of HVAC Installation and Maintenance in Thornton

What you pay for HVAC installation or maintenance is determined by your system type. Common HVAC unit styles include the following:

  • Split or mini-split: Homes without ductwork for central air frequently have split or mini-split HVAC systems. These systems consist of indoor units in each room to regulate temperature. These indoor units connect to an outdoor unit.
  • Hybrid split: A hybrid split HVAC system works almost the same as a standard split system. It has the advantage of being able to utilize either gas or electricity for power.
  • Heat pump: Heat pumps exchange warm and cool air between your home and outside. They don't generate their own heating and cooling, so they work more effectively in more mild climates.
  • Packaged heating and air: Packaged HVAC systems work well in smaller homes. They consist of a single combined heating and air conditioning unit, typically located in a basement or attic. This unit is typically small, cost-effective, and easy to maintain.

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 TypeCost
Split$1,939-$4,943
Hybrid Split$3,929-$7,238
Heat Pump$3,042-$30,996
Packaged Heating and Air$255-$424

Ways to Save Money on HVAC Costs

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.

  • Change filters regularly. Replacing or cleaning your air filters every 30–90 days helps air flow efficiently through your HVAC system. We also recommend regularly clearing dirt and debris away from the external parts of your system.
  • Keep your system clean. Keeping your ductwork, grills, condenser fan blades, and indoor evaporator coil clean helps your system run and reduces the chance of mold growth. The National Air Duct Cleaners Association recommends cleaning your HVAC system whenever it begins to look dirty.
  • 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 heat from getting inside. Doing both helps lessen the strain on your HVAC system.
  • 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 too expensive.
ServiceCost
Filter Replacement$64-$170
Condensor Cleaning$1,273-$3,818
Thermostat Repair$85-$212
Ductwork Cleaning$407-$1,018

How To Choose a Local HVAC Company

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.

Compare Multiple Bids

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.

Check Credentials

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.

Understand Work Details

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.

Compare Warranties

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 Quote in Writing

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.

Frequently Asked Questions About HVAC in Thornton, CO

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.

Other Thornton, CO Home Services

Loading map...