10 Best HVAC Companies in Freeport, IL

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Last Updated: February 25, 2025

According to the U.S. Department of Energy, about 55% of the energy used in American homes is used for heating and cooling. It's important that the temperature control systems in your Freeport home are functioning optimally, so that you don't spend more than you need to.

Read our list of the top HVAC companies in Freeport to find the right one for you and your home. Our topic contractors can help you reduce your bills while still staying comfortable.

Top 10 Best HVAC Companies in Freeport

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Triple Service Inc.

Triple Service Inc. Logo

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801 Monroe St, Mendota, IL 61342 (815) 857-8457 tripleserviceinc.com

Informative resources

Clear pricing policy

Reliable customer support

Free quotes

Services Offered

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

Wohlers Heating & AC

Wohlers Heating & AC Logo

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351 Progress Dr, Cottage Grove, WI 53527 (608) 839-1604 wohlersheating.com

Clear pricing policy

Free quote

Informative resources

Reliable customer support

Services Offered

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

Lanz Furnace & Fireplace

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1206 29th Ave, Monroe, WI 53566 (608) 291-3606 lanzfurnace.com

Clear pricing policy

Informative resources

Prompt service delivery

Free quote

Reliable customer support

Services Offered

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

Upmann Heating & Cooling

Upmann Heating & Cooling Logo

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3142 S Hancock St, Dodgeville, WI 53533 (608) 623-3999 upmannheating.com

Reliable customer support

Clear pricing policy

Informative resources

Free quotes

Services Offered

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

BETHKE Heating & Air Conditioning, Inc.

BETHKE Heating & Air Conditioning, Inc. Logo

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521 Half Mile Rd, Verona, WI 53593 (608) 251-2222 bethkeheating.com

Reliable customer support

Free quotes

Prompt service delivery

Clear pricing policy

Services Offered

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

24HR Home Comfort Services

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310 Sunnyside Dr, Milton, WI 53563 (608) 674-5456 24hrhcs.com

Free quotes

Reliable customer support

Informative resources

Clear pricing policy

Services Offered

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

Southport Home Services

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3304 Dairy Dr, Madison, WI 53718 (608) 560-5464 southportheating.com

Informative resources

Reliable customer support

Clear pricing policy

Services Offered

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

Shackelford Heating & Cooling

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5555 Irish Ln, Fitchburg, WI 53711 (608) 835-7755 shackelfordheating.com

Informative resources

Free quotes

Reliable customer support

Services Offered

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

Hero Heating & Air Conditioning

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1132 Pleasant St STE C, DeKalb, IL 60115 (815) 756-8936 heroheating.com

Clear pricing policy

Reliable customer support

Free quotes

Informative resources

Services Offered

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

Aire Serv of Lake Geneva

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N, 1314 Brick School Rd, Walworth, WI 53184 (262) 394-0200 aireserv.com

Prompt service delivery

Clear pricing policy

Reliable customer support

Free quotes

Informative resources

Services Offered

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

A faulty or aging HVAC system probably needs attention from a professional who can make fixes or install a new unit. Look out for these common indicators that your HVAC needs service:

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

Book an inspection if you notice any of these issues. A local technician can inspect your system, identify problems, and decide whether you need to fix or replace your HVAC.

Cost of HVAC Installation and Maintenance in Freeport

The price of HVAC installation or maintenance changes depending on the kind of unit you have. Common types of HVAC units 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 internal units in each room to control temperature, which all connect to an outdoor unit.
  • Hybrid split: A hybrid split HVAC system functions much like a standard split system, but is able to utilize either gas or electricity as energy sources.
  • Heat pump: Heat pumps move hot and cold air between your house and outside. They don't make their own heating and cooling, so they work more effectively in more mild climates.
  • Packaged heating and air: Packaged HVAC systems work best in smaller homes. They consist of a single combined air conditioner and heating unit, typically located in a basement or attic. This unit is typically compact, energy-efficient, and easy to maintain.

HVAC maintenance costs vary depending on what services are needed. HVAC systems are complex and may require different kinds of maintenance. Costs for common services are as follows:

HVAC Unit TypeCost
Split$1,881-$4,794
Hybrid Split$3,811-$7,021
Heat Pump$2,951-$30,067
Packaged Heating and Air$247-$412

Ways to Save Money on HVAC Costs

Taking care of necessary HVAC repairs and replacements when needed is important, but can be costly. Thankfully, there are steps you can take to minimize wear and tear over time on your 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 out of hand.
  • Change filters regularly. Air flows most effectively through your HVAC system when you replace or clean the filters every 30–90 days. Also avoid letting debris pile up on the outdoor parts of your HVAC.
  • Keep your system clean. Keeping your indoor evaporator coil, condenser fan blades, grills, and ductwork clean helps your system run and reduces the risk of mold growth. The National Air Duct Cleaners Association recommends that you clean your HVAC system whenever it begins to look dirty.
  • 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 amount of work your HVAC system needs to do.
ServiceCost
Filter Replacement$62-$165
Condensor Cleaning$1,235-$3,704
Thermostat Repair$82-$206
Ductwork Cleaning$395-$988

How To Choose a Local HVAC Company

Knowing the indicators of a reliable 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

Request estimates from three or more HVAC providers. Explain your issues and ask if specialists can inspect your system in person. Review each company's diagnoses, recommended solutions, estimated cost, timeline, and warranties. Avoid companies that pressure you or demand payment before work.

Check Credentials

When selecting an HVAC company, choose one with technicians that have the right training, licenses, and experience. In all states, HVAC contractors must obtain a Section 608 Technician Certification from the Environmental Protection Agency (EPA). This certification is required for all contractors who "maintain, service, repair or dispose of equipment that could release refrigerants into the atmosphere." An individual 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 by the state.

The state of Illinois doesn't have state-level licensing requirements for contractors. However, there may be local regulations, so make sure to check with your municipal government to confirm that your contractor meets all of the requirements. You can verify an Illinois business license on the Secretary of State's website. Checking reviews on Google Reviews, Yelp, the Better Business Bureau (BBB), and similar sites can assist your decision as well. Choose a provider with stellar reviews and reports of positive experiences from customers.

Understand Work Details

Always make sure you know what a company’s process looks like. When HVAC repairs are needed, ask your provider to specify which parts need replacement and explain why. Confirm that your technician will clean and test the system after finishing the work to verify proper operation. When replacing your HVAC system, request that the installation company describe the new features, estimated installation time, energy efficiency, model, and brand. Before signing a contract, ask how your provider plans to accurately size the unit for your home and how much it will cost.

Compare Warranties

Reliable HVAC companies provide warranties for their services. The broader the coverage, the better, so make sure to review warranties between providers. Choose the one that offers the best coverage at a fair cost.

Get Quote in Writing

Always get estimates for HVAC service in writing before work begins. A comprehensive quote should cover both labor and materials. Make sure you review all terms before signing a contract.

Frequently Asked Questions About HVAC in Freeport, IL

You should have your HVAC system inspected about twice a year. After completing their inspection, your technician will inform you if any services are required. You should also schedule an inspection if you notice new issues such as unusual smells, strange noises, or leaks. If your home has ductwork, it should be inspected every few years.

Usually, you should have your HVAC system inspected in the spring and fall, as these times tend to be less busy. This also helps make sure your system is prepared for the summer and winter, when it typically sees the most use.

You can save energy throughout the year by reducing the amount of power your HVAC system uses to maintain your home's temperature. Always 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 may also consider purchasing a smart thermostat.

Generally, HVAC installation or replacement takes between one and three days for the entire system. 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 depend on things like the size of your house, how easily accessible different areas are, and whether your technician runs into any problems.

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 look for an air conditioning unit with between 2.5 and 5 tons of capacity. In general, 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 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 find the best option for you.

There are several ways you can make your HVAC system more energy-efficient:

  • Keep ductwork clean, and clean or change your air filters on a regular basis.
  • Have regular inspections to take care of problems as they come up.
  • Make sure your doors and windows are well-sealed and keep your attic well-ventilated.
  • Install a smart thermostat. If you aren't able to purchase one, try keeping the temperature indoors as close to the outside temperature as you can.
  • When you need to replace part of your system, explore Energy Star-certified or other environmentally friendly options.

Other Freeport, IL Home Services

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