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10 Best HVAC Companies in Longmont, CO

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Written By Bradford Cuthrell

Last Updated February 2024

If you're like the typical American homeowner, over half of your energy bill (55%, per the U.S. Department of Energy) goes toward heating and cooling your home. It's important that the heating and cooling systems in your Longmont home are functioning properly, so that you don't spend more than you need to.

A talented HVAC contractor can get your system into its best shape ever, 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 Longmont.

Top 10 Best HVAC Companies in Longmont

KJ Thomas Mechanical

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

Clear pricing policy

Informative resources

Prompt service delivery

Free quote

Reliable customer support

Services Offered

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

Colorado's Finest Heating and Air Conditioning

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1524 Collyer St, Longmont, CO 80501 (720) 378-1135 coloradosfinestheating.com

Clear pricing policy

Prompt service delivery

Free quote

Informative resources

Reliable customer support

Services Offered

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

Welzig Heating & Air

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1831 Boston Ave, Longmont, CO 80501 (303) 678-5576 welzig-heating-and-air.com

Free quote

Clear pricing policy

Reliable customer support

Informative resources

Services Offered

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

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

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

Reliable customer support

Clear pricing policy

Informative resources

Free quote

Services Offered

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

Service Experts Heating & Air Conditioning

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1650 Skyway Dr Unit A, Longmont, CO 80504 (303) 776-8556 serviceexpertslongmont.com

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Free quote

Reliable customer support

Clear pricing policy

Services Offered

Zoning systems
Indoor air quality
Ventilation
Ac installation
Furnace repair
Maintenance
Furnace installation

Blue Valley Heating & Cooling

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1740 Skyway Dr UNIT H, Longmont, CO 80504 (303) 993-2645 bluevalleyheatingcooling.com

Prompt service delivery

Reliable customer support

Clear pricing policy

Informative resources

Services Offered

Ductless
Furnace repair
Ac repair
Ac installation
Furnace installation
Boiler repair
Maintenance
Boiler installation
Ventilation
Emergency services

Highland Heating & Air, Inc.

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14286 Mead St, Longmont, CO 80504 (303) 848-0095 highlandheating.com

Clear pricing policy

Prompt service delivery

Reliable customer support

Free quote

Services Offered

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

Circulating Air Inc

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500 9th Ave #12, Longmont, CO 80501 (303) 772-7960 circulatingairinc.com

Prompt service delivery

Free quote

Clear pricing policy

Reliable customer support

Services Offered

Maintenance
Ventilation
Furnace installation
Ac installation
Inspection
Ac repair
Filtration

Carbon Valley Heating and Air

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810 1st Street, Firestone, CO 80520 (303) 731-2300 carbonvalleyheatingandair.com

Reliable customer support

Clear pricing policy

Informative resources

Services Offered

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

SAC Mechanical Heating & Air Conditioning

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105 S Sunset St A, Longmont, CO 80501 (303) 825-9483 sacmechanical.com

Informative resources

Reliable customer support

Clear pricing policy

Services Offered

Furnace repair
Furnace installation
Ac installation
Ac repair
Indoor air quality
Boiler installation
Boiler repair
Filtration
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 having issues or getting old, it likely needs repairs or replacement from an HVAC company. Look for these indicators your system needs service:

  • Unusually high energy bills
  • Refrigerant leaks
  • Frequent breakdowns and need for repairs
  • Temperature control issues or thermostat malfunctions
  • Poor air circulation or uneven heating/cooling
  • Corrosion, cracking, or rust
  • Strange noises when turning on
  • 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 identify problems and determine whether repair or full HVAC replacement is needed.

Cost of HVAC Installation and Maintenance in Longmont

Your HVAC installation or maintenance cost fluctuates depending on the type of unit. Common HVAC unit types include the following:

  • Split or mini-split: Homes without ductwork for central heating and cooling frequently have split or mini-split HVAC systems. These systems consist of internal units in each room to regulate temperature, which all connect to an outdoor unit.
  • Hybrid split: A hybrid split HVAC system operates similar to a normal split system, but has the benefit of being able to draw power from either gas or electric sources.
  • Heat pump: Heat pumps exchange warm and cool air between your home and outside. These systems don't produce their own heat or AC, so they work more effectively in moderate climates.
  • Packaged heating and air: Packaged HVAC systems are good for smaller homes. Packaged systems consist of a single combined heating and cooling unit that's typically located in an attic or basement. This unit tends to be efficient, compact, and easy to maintain.

HVAC expenses vary based on the services needed. HVAC systems are complex and may need several types of maintenance. Costs for common jobs are as follows:

HVAC Unit TypeCost
Split$2,008-$5,120
Hybrid Split$4,069-$7,497
Heat Pump$3,151-$32,106
Packaged Heating and Air$264-$439

Ways to Save Money on HVAC Costs

It’s important to take care of HVAC repairs and replacements when they are required, 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.

  • Change filters regularly. Switching out or cleaning your air filters every 1–3 months helps air flow efficiently through your HVAC system. You should also try to prevent dirt and debris from building up around the outdoor sections of your system.
  • Monitor for potential problems. Monitoring your system for problems — for example, by checking your thermostat and energy bills regularly — helps you get ahead of problems before they get too expensive.
  • Change the position of your blinds seasonally. Keeping your blinds closed in the summer helps block out passive solar heat. Keeping them open in the winter helps you take advantage of this same heat. Both of these measures help reduce the strain on your HVAC system.
  • Keep your system clean. Cleaning your indoor evaporator coil, ductwork, condenser fan blades, and grills regularly helps keep your HVAC system working 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.
ServiceCost
Filter Replacement$66-$176
Condensor Cleaning$1,318-$3,955
Thermostat Repair$88-$220
Ductwork Cleaning$422-$1,055

How To Choose a Local HVAC Company

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

Compare Multiple Bids

Contact at least three HVAC contractors for quotes. Describe your issues and schedule an in-person inspection if possible. Compare companies' diagnoses, suggested repairs, estimated costs, timeframes, and warranties. Avoid companies that pressure you or demand upfront payment.

Check Credentials

Look for an HVAC company that employs skilled technicians who have the necessary training and licenses. HVAC contractors in all states 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 what kind of equipment they intend to work with) to be certified by the EPA. All other licensing requirements are handled by the state.

The state of Colorado doesn't have state-level HVAC contractor licensing requirements; however, those who operate an HVAC business are required to have a Colorado business license, plus insurance. You may want to check with your municipal government to learn if there are local licensing requirements for HVAC contractors. Any contractors who do plumbing or electrical work in addition to HVAC work must be registered with the State Plumbing Board or the Colorado Electrical Board, respectively. Always check a provider's reviews and complaints with organizations such as Yelp, Google Reviews, and the Better Business Bureau (BBB). Choose a provider with positive reviews and a history of good customer service.

Understand Work Details

Always make sure you understand what a company’s process is like. When getting HVAC repairs, ask your provider to list which parts require replacement and why. Confirm that your technician will clean and test the full system afterward to verify proper operation. When replacing your HVAC system, ask your contractor to provide details on the new brand, features, estimated installation time, model, and energy efficiency. Before work begins, make sure you understand the process your provider will use to select the correctly sized system for your home and what the cost will be.

Compare Warranties

A trustworthy HVAC company will back its repair work and installations with a warranty. The longer and more comprehensive the warranty coverage, the better. Carefully review the fine print for each contractor and choose the provider that offers the greatest protection within your budget.

Get Quote in Writing

Always get HVAC bids in writing before work begins. A detailed quote will cover costs for both labor and materials. Confirm that you understand all terms before signing the contract.

Frequently Asked Questions About HVAC in Longmont, CO

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

The best times of the year to have an HVAC inspection are during the spring and fall. Technicians are generally less busy during these times, making it easier to get an appointment. This also ensures that your system is ready for the summer and winter, the times of the year when it 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 the temperature of your home. During all seasons, keep your thermostat as close to the outside temperature as you can, and avoid making drastic changes — adjust it only a few degrees at once. You may also consider installing a smart thermostat.

For a 2,000-square-foot home, try to purchase 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. Generally, if your home is over 1,000 square feet, central air will be more effective than window air conditioning units.

Your HVAC company may provide financing options through a third-party lender, or you may choose to obtain a loan on your own. It's smart to discuss payment options with your HVAC company and a financial advisor 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:

  • Make sure your air ducts remain clean, and clean or change your air filters regularly.
  • Schedule regular inspections to take care of problems 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 to keep your inside temperature as close to the outside temperature as you can.
  • When it comes time to replace any part of your HVAC system, explore Energy Star-certified or similar environmentally friendly options.

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