Find trusted air conditioning & heating professionals serving Illinois. All contractors are independently researched and certified.
Only companies with a Certified Best Pick® badge meet our strict satisfaction & licensing requirements and are eligible for the Best Pick Guarantee.
Only companies with a Certified Best Pick® badge meet our strict satisfaction & licensing requirements and are eligible for the Best Pick Guarantee.
"We're a family-operated business that strives to provide a helpful, friendly environment for our clients while giving back to the surrounding communities. We are honest, and we stand by the quality of our work 24 hours a day, 7 days a week."
"Our customers have trusted us since 1928 to repair or replace almost any home system related to plumbing, gas piping, drains, sewers, heating, cooling, electric, or generators. They can call us 24/7/365 and know that a real person will answer the phone and background checked, drug tested technicians will arrive at their door."
"I love helping our customers in any way I can. Whether it's just a small repair or a complete home installation, we're always there for you, 24 hours a day. Our motto is: 'Large enough to serve, small enough to care.'"
"Being a family-owned business that started in plumbing over 75 years ago, ABC is the company thousands of homeowners have counted on to the get job done and done right. If you've got a leaky pipe, a bad water heater, or a kitchen faucet that you need help with, you can make one call to ABC and Consider It Done."
"Since 1904, Shavitz HVAC has operated by the same motto: 'Do right by the customer.' We provide highly trained, uniformed, drug-tested, and background-checked technicians with the latest tools and detailed checklists to ensure quality. Our employees strive to keep your home or business comfortable and save you money."
"At One Hour, our mission states: 'We serve people with the highest degree of honesty and business integrity.' Every day, our company lives up to this challenge. We strive to exceed each customer's needs by providing excellent HVAC service and only hiring the most competent, friendly, and trustworthy technicians in the business."
"Intelligent Service has been providing unparalleled service to homeowners in the Chicago area since 1982. We pride ourselves on employing the best, most highly trained plumbing, heating, and cooling technicians in the country. We believe in serving at the highest level, and we look forward to the opportunity to serve you."
"We have been a leader in the area for many years and continue to set the standards in our industry. We've gained a reputation for excellence in our service area and have become a recognized name in Chicago."
"Think Green! Your local HVAC and air duct cleaning company for all your HVAC needs. Providing energy-efficient services to save the environment and lower your energy bills while delivering exceptional service!"
"OneStop Pro was founded in 2007 with a mission to deliver the best service and workmanship in the plumbing, HVAC, and electric fields for homeowners and business owners in DuPage County. To accomplish this, we built OneStop Pro around the needs and desires of our clients and our skilled team members."
"Quality service, fair pricing, industry-leading guarantees, and a commitment to total customer satisfaction are just a few of the many reasons why Four Seasons has become one of Chicagoland's largest and most trusted provider of heating, air conditioning, plumbing, and electrical services. 'For all the Right Reasons, Call 866-4-Seasons!'"
"When you need a trusted HVAC contractor, plumber, or electrician in the Chicago suburbs, count on Perfect Home Services. Our licensed technicians offer expert installation, repair, and maintenance for plumbing, heating, cooling, and electrical needs. The Perfect Team delivers solutions to keep your home running smoothly."
"Cooling and air conditioning systems require regular maintenance and repair, especially if you run them frequently. We have experienced HVAC technicians who are up to date on the latest in cooling repair methods so that you can be confident in our services. Our technicians are skilled in a variety of different heating systems, including gas furnaces, electric furnaces, and geothermal heat pumps. We ensure that all of our HVAC technicians have the appropriate certification and training so that you can be confident you are getting the best heating repair and maintenance possible, all at the least cost to you! Superior plumbing at affordable rates. From leaky pipes to the installation of water heaters, we can handle it all and often at a fraction of the cost of our competitors. In fact, we guarantee to match or beat the prices of our competitors! With 24-hour availability, we do everything we can to be reliable, fast, and friendly!"
Real homeowners looking for air conditioning & heating in your area
"The furnace has no heat but fan keep running. I will be at home 4pm. Thanks."
"the heating &. air need to be replaced"
"I need my furnace inspected and check for any leaks of gas. I work during 8-6 so email will be the best way to get in co..."
"AC stopped worked."
"Maintenance for 3 residential AC and furnace units"
"One of my units replaced with the suction line to the coil in my attic."
"Hi, we previously received a quote for a standard water heater, but would also like a quote for a tankless water heater..."
"Heat is on at 74 but house feels cold And cool air comes through vents"
"I'd like to get an estimate to replace both my ac & furnace."
"furnace install"
"Very friendly and knowledgeable and respectful service personnel. They did a great job and the prise was reasonable. Will call on them for any othe…"
"High quality work. Thorough. Friendly service men. I think the monthly insurance is too htgh."
"Intelligent Plumbing Services was great and they were quick! Somebody was out within an hour when I called them."
"Whenever I have a problem, Ravinia is the only company I call. I always rave to my friends about their top notch services."
"They were very neat did a nice work I was a sheet metal worker my whole life and I retired, they did an excellent work very clean and neat. The job w…"
"The technician that worked on my A/C did a great job. I had a problem with the coil that was installed by another A/C company. He had to do a lot of …"
Every Best Pick company in Illinois is independently researched and certified annually. We analyze thousands of customer reviews, verify licensing and insurance, and confirm each company meets our strict qualification standards.
We conduct extensive satisfaction surveys and analyze thousands of customer experiences annually.
Verified by
Independent Research
Companies earn Best Pick certification through performance alone. Only businesses with 80%+ recommendation rates qualify.
Best Pick status isn't permanent. Every certified company must re-qualify annually.
Licensed
Insured
Verified
We stand behind our certified companies with a financial guarantee up to $2,500.
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Financial guarantee included
Only air conditioning & heating companies that meet our strict standards earn Best Pick status.
Air Conditioning & Heating companies must maintain a 4.0+ rating and an 80% recommendation rate.
Current state contractor license verification and general liability insurance for air conditioning & heating work
Minimum 1 year in business with established local presence
Maintain active business registration and in good standing with the state
Consistent air conditioning & heating service quality across all projects
Must re-qualify every year through new research
Common questions about Certified Best Pick® air conditioning & heating companies in Illinois
Best Pick Certified Air Conditioning and Heating companies in Illinois, IL have earned their status through independent consumer research—not paid placement. To qualify, a company must meet strict standards:
Certification is re-verified annually, ensuring continued performance.
No. Air Conditioning and Heating companies cannot buy Best Pick Certification, improved ratings, or better placement. Our research team independently evaluates companies based on customer satisfaction, licensing, insurance, and business stability—before any business relationship exists.
Companies that earn certification pay a participation fee after qualifying, which covers the cost of ongoing research and publication. This fee has no influence on whether a company qualifies or how they appear in our directory.
The Best Pick Guarantee provides financial protection—up to $2,500 in labor costs—if a Certified Best Pick Air Conditioning and Heating company fails to deliver on their commitments.
To be eligible:
This guarantee applies only to Certified Best Pick companies, not Standard Pros. Full terms are available on our guarantee page.
Your furnace may be struggling with Illinois' brutal winters if you hear it cycling on and off every few minutes without the house getting warmer. Polar vortex events push older 80 AFUE systems to their limits, and short-cycling often indicates that the heat exchanger is overheating or the flame sensor is failing before it can reach the target temperature. If your home has a full basement standard in the Chicago metro or Peoria areas, check the sheet metal joints; over decades, these connections in pre-1970 homes develop leaks that drop conditioned air into the basement instead of the living rooms. A sudden spike in your Peoples Gas or Nicor bill usually points to failing blowers that have to run longer to overcome the extreme heating demand of 6,200 HDD. These signs mean the system needs more than a filter swap to survive the next arctic snap.
Before you call for repairs, checking a few items based on our Midwest climate could save a trip. Start by inspecting your exterior furnace exhaust and intake vents; in areas prone to lake-effect snow or heavy drifts, a simple snow blockage will trigger a safety shutdown of a high-efficiency gas furnace. Check your whole-home humidifier setting, as Illinois' dry winter indoor air can drop below 20% humidity, causing static and health issues if the water panel is calcified from hard water. Examine your outdoor condenser for cottonwood seeds or grass clippings common in central Illinois prairies, which coat coils and cause systems to trip when summer temperatures hit the mid-80s. If your suburban 1980s-era home has a tripped breaker despite these checks, avoid resetting it repeatedly. Anything involving the heavy electrical load of a compressor or the gas ignition of a forced-air furnace should be left to a licensed professional to ensure safety.
Illinois technicians provide specialized services to maintain comfort through extreme temperature swings. High-efficiency gas furnace upgrades are the most frequent request because the intense heating load of 6,200 HDD in the north makes a 95+ AFUE unit a necessity for both comfort and managing monthly ComEd or Nicor costs. Boiler and radiator maintenance is a core service in older neighborhoods like Oak Park or Evanston, where century-old grease-fired or coal-converted systems require expert cleaning to prevent air-locks and leaking valves. Many homeowners also opt for whole-home air purification and humidification due to trapped indoor particulates during long winter inversions and the extreme dryness of the Great Plains air. For owners of suburban homes built during the 1990s boom, refrigerant conversion from R-22 to modern R-410A is common as these aging systems lose efficiency and parts become scarce.
To find the best HVAC company in Illinois, begin with a check of their technical credentials and insurance. In Illinois, roofing and plumbing require state-level licenses via the IDFPR and Dept of Health, while HVAC pros must show NATE certification and a federal EPA 608 card for refrigerant handling. A true local expert will be familiar with ComEd and Nicor rebates for high-efficiency systems and should understand the unique challenge of coordinating multi-unit replacements in Chicago two-flats. Best Pick Reports serves as a reliable resource by vetting contractors through a thorough 6-step merit-based process. This certification cannot be bought and requires a 4.0+ Google rating or an 80% score from independent customer surveys. Using this tool saves you hours of research while providing a $2,500 guarantee on labor costs for added protection. Always request written estimates that detail the expected efficiency gains for our heavy heating cycles.
