TRUSTED HVAC SERVICE IN HERRIN, WILLIAMSON COUNTY & SURROUNDING AREAS
RELIABLE HVAC REPAIR, INSTALLATION & MAINTENANCE ACROSS SOUTHERN ILLINOIS
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Full-Service HVAC Solutions from Collard Heating & Air Conditioning Across Williamson County & Southern Illinois
At Collard Heating & Air Conditioning, our certified team provides comprehensive residential and commercial climate solutions tailored to the needs of Southern Illinois properties. From routine seasonal checkups to complex system installations, we offer dependable, honest workmanship across all major equipment makes and models. Our primary goal is delivering reliable HVAC service in Herrin, IL that homeowners can rely on through every season.
We Work Hard to Deliver That WOW Service That You Expect & Deserve.
Thank You For Allowing Us to Earn Your Trust!
Average Rating
Posted on Google
John Howerton
9 days ago
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
Trustindex verifies that the original source of the review is Google.
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.
Posted on Google
Laura Cochrum
324 days ago
Trustindex verifies that the original source of the review is Google.
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!
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Your Trusted Experts in HVAC Service in Herrin, IL
Collard Heating & Air Conditioning has earned a standing as a trusted leader in local HVAC services across Southern Illinois. Homeowners and businesses rely on our team because we bring certified expertise to every job, from routine system tune-ups to complex heating and cooling installations. Utilizing modern diagnostic tools and proven industry techniques, we deliver long-lasting comfort solutions backed by a complete satisfaction guarantee. Clear communication, upfront pricing, and honest service guide everything we do, ensuring you stay fully informed at every stage of your repair or replacement.
WHY CHOOSE COLLARD?
LOCAL. RELIABLE. TRUSTED.
Certified technicians with years of experience
24/7 emergency HVAC service
Honest, upfront pricing
Service all major brands
Proudly serving oue friends and neighbors in Southern Illinois
FAQs
Frequently Asked Questions
General & Maintenance Plan FAQ
What areas do you serve & maintain in Southern Illinois?
Collard Heating & Air Conditioning proudly serves Herrin, IL, and surrounding communities across Williamson, Jackson, Franklin, and Perry counties—including Marion, Carterville, Carbondale, West Frankfort, Johnston City, and Du Quoin.
What brands of HVAC equipment do you service and install?
We are an authorized Lennox™ dealer, offering top-tier, high-efficiency equipment. However, our certified technicians are fully qualified to repair and maintain all major brands and models, including Allied™ Air units.
What are the benefits of enrolling in a preventative maintenance plan?
Regular bi-annual maintenance extends the lifespan of your system, keeps utility costs down by optimizing energy efficiency, prevents sudden emergency breakdowns, and keeps manufacturer warranties active.
Air Conditioning & Cooling FAQ
How frequently should I replace my HVAC air filters?
Standard disposable air filters should be checked monthly and replaced every 30 to 90 days. If you have pets, high dust exposure, or household members with allergies, changing them every 30 to 45 days is recommended.
What causes an air conditioner to blow warm air or freeze up?
Warm air and frozen coils are typically caused by restricted airflow (such as a severely clogged air filter), low refrigerant charge levels due to a leak, a failing compressor, or dirty evaporator coils. Turn the system off and request service immediately if you notice ice forming on the refrigerant lines.
What is a ductless heat pump or mini-split, and is it right for my home?
A ductless mini-split provides zoned heating and cooling without requiring traditional ductwork. It is an ideal solution for room additions, converted garages, sunrooms, older homes without existing air ducts, or specific rooms that need independent temperature control.
Heating Services FAQ
How often should I have my furnace or heating system serviced?
Your heating system should be professionally inspected and tuned up at least once a year, ideally in early fall before the winter heating season begins.
What are the signs that my furnace needs immediate repair?
Common indicators include strange mechanical noises (banging, squealing, or rattling), sudden spikes in your energy bill, yellow burner flames instead of crisp blue ones, rapid cycling (turning on and off frequently), or blowing cold air when heat is called for.
Should I repair or replace my aging boiler or furnace?
If your furnace or boiler is over 15 to 20 years old, requires frequent repairs, or causes excessive utility bills, upgrading to a high-efficiency Lennox™ heating system is often more cost-effective in the long run than continuing to patch an old unit.
Indoor Air Quality (IAQ) & Smart Thermostat FAQ
How can I improve the indoor air quality in my Southern Illinois home?
You can significantly improve indoor air quality by installing whole-home air purifiers, high-efficiency MERV filtration systems, UV germicidal lights, and whole-house dehumidifiers to control summer humidity and eliminate airborne allergens, dust, and mold spores.
Can upgrading to a smart thermostat really lower my monthly energy bills?
Yes, upgrading to a programmable or Wi-Fi smart thermostat (such as ecobee or Lennox smart controls) allows you to set energy-saving temperature schedules and control your home comfort remotely, reducing energy usage by up to 10–12% annually on heating and cooling costs.
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.
