Trusted HVAC, Heating, and Cooling Services for Southern Illinois Homes and Businesses
Our Core HVAC Services in Williamson County, IL
Our comfort is more than a thermostat setting, it’s peace of mind knowing your home or business is in expert hands. For decades, our team has been serving Williamson, Franklin, and Jackson counties with trusted heating, cooling, and indoor air quality solutions that keep you comfortable in every season.
While we began as Collards Heating & Air Conditioning, our evolution into Collards represents a fresh chapter in service, technology, and customer care . It’s the same skilled professionals, the same dedication to doing the job right the first time, and now an even stronger commitment to delivering comfort you can count on every day.
We Service All Major HVAC Brands with Proven Expertise
Ready for Reliable HVAC Service in Herrin, IL and Southern Illinois?
The name on your heating or cooling system should never limit who you trust to service it. At Collards, our expertise covers every major HVAC make and model found in southern Illinois homes and businesses. From the most advanced high-efficiency systems to decades-old workhorses still keeping homes comfortable, we have seen it, worked on it, and know exactly how to keep it running at its best.
Our technicians are highly trained, deeply experienced, and equipped with the tools and diagnostic technology to work on any system you have. This is not guesswork, it is proven skill built over years of hands-on work in Marion, Herrin, Carterville, and every corner of our service area. We understand the unique quirks of each brand, from their installation requirements to the way they respond to our region’s hot, humid summers and cold, damp winters.
When you choose Collards, you get the confidence of knowing your system is in the hands of professionals who do it right the first time, protect your investment, and keep your home or business comfortable year-round, no matter what brand is on the label.
Don’t wait until your system breaks down to call for help. Whether you need fast AC repair, a new furnace installation, or an indoor air quality upgrade, Collards Heating & Air Conditioning is here to keep your home or business comfortable year-round. Our friendly, skilled technicians know how to get the job done right the first time and at a fair price. Contact us today to schedule your service and see why your neighbors in Herrin and surrounding Southern Illinois communities trust us for all their heating and cooling needs.
What They Say!
We Work Hard to Deliver That WOW Service That You Expect & Deserve.
Trustindex verifies that the original source of the review is Google.
Joel had my system back up and running in less than a hour for a great price, he showed me exactly what was wrong and how it was happening
Posted on Google
Lady Yashacat
21 days ago
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DORIS apple happy with the service from Jacob Prince
Posted on Google
Geni Cramer
86 days ago
Trustindex verifies that the original source of the review is Google.
Wonderful team! The office team got us scheduled the very next day. Our tech Tyler came out, figured out the issues with our unit and very patiently explained everything that needed to be done before handling the issue. 10/10 highly recommend.
Posted on Google
Brandon Brink
88 days ago
Trustindex verifies that the original source of the review is Google.
Tyler came out on time and fixed my AC the same day at a good price. I had a different company look at it and they said it needed a new system. Glad I got a second opinion. Thanks for being good and honest!
Posted on Google
Elizabeth Dannan
270 days ago
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Great services and great staff. Highly recommend. Doug is the best.
Posted on Google
Brandon Weisenberger
277 days ago
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Doug came out today for our annual furnace inspection. He did exceptional work getting everything cleaned and tuned up, and he gave us valuable insights on equipment failures that are likely to be upcoming due to the advanced age of our unit.
Posted on Google
Deb N
291 days ago
Trustindex verifies that the original source of the review is Google.
Our newer furnace had stopped working in the middle of the night. I called early and they were able to come out same day and get it going again. Paid for parts and service and they will be back with the new part in just a few days. Happy with service.
Posted on Google
Martha Mandrell
323 days ago
Trustindex verifies that the original source of the review is Google.
Doug was quick and efficient. The best cleaning I've ever had.
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Laura Cochrum
324 days ago
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The tech, Doug, was very professional and courteous. I so appreciates him respecting our home by wearing shoe covers that means alot! We have had very good service with Collards!
Posted on Google
lonna parker
345 days ago
Trustindex verifies that the original source of the review is Google.
Very nice serviceman! Very fast and knowledgeable...
Will use again!
Set your thermostat and find your perfect comfort zone with help from Collard Heating & Air Conditioning. As an authorized Lennox™ dealer providing HVAC service in Herrin, Illinois, we make customer satisfaction our top priority. Our friendly, professional team delivers prompt service and precise maintenance agreements to keep your system running at its best. Moreover, our experts are fully capable of repairing most makes and models, including Allied™ Air units, so you can count on us to get the job done regardless of your existing system’s manufacturer.
Contact us in Herrin, Illinois, to turn the dial up on comfort.
