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312-818-2840
Chicago, IL 60618
Northbrook, IL 60062
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For over 73 years, we have been dedicated to providing reliable service, expert craftsmanship, and unmatched customer care. Our loyal clients has allowed us to grow, evolve and continue serving our community with the highest standards.
From the city to the North Shore and surrounding suburbs, Guardian Heating & Cooling is proud to deliver dependable service and exceptional comfort to thousands of local homes and businesses.
Explore our latest heating and cooling tips, guides, and expert insights to keep your home comfortable in every season. From energy-saving advice to maintenance reminders and system troubleshooting, our blog is here to help you make informed decisions about your HVAC system.

Posted on Google Mary FabianskiTrustindex verifies that the original source of the review is Google. Guardian Heating and Cooling has been my heating and air conditioning contractor ever since I moved into my Chicago home 25 years ago. I have replaced/upgraded my furnace and air conditioner over the years, and, at the same time, followed regular seasonal maintenance on my units. All systems are good and running well, but my concern for my ever-increasing gas bills prompted a request to have Guardian come to my home and consult, evaluate, and advise me on possibly improving the efficiency of my home heating and cooling systems. Jasper and Jonathan arrived promptly, introduced themselves, and first, asked me about my concerns. After a thorough walk-through and accompanying explanations of possibilities, they advised me on how to improve the comfort levels, both heating and air conditioning. They explained everything clearly and completely, and there was never any pressure to change and/or update and then spend, spend, spend. They gave me honest advice which I understood and appreciated, and which ultimately did improve the comfort levels in my home for both heating and air conditioning. Jasper and Jonathan, thank you again. I am one happy Guardian Heating and Cooling customer!Posted on Google Gene RehmertTrustindex verifies that the original source of the review is Google. Bert arrived on time was very courteous and knowledgeable. He thoroughly explained the problem with our AC and how he would fix it.Posted on Google KerryexcTrustindex verifies that the original source of the review is Google. Very nice customer service and smooth, transparent processPosted on Google william davitTrustindex verifies that the original source of the review is Google. Awesome service!!Posted on Google Terri Bel Bliss (Terry)Trustindex verifies that the original source of the review is Google. I have used Guardian heating and cooling services for nearly thirty years now. They have been a very reliable and capable servicer of my HVAC system and I am sure this is why my systems are so long lived. I highly recommend them for service and new installation and intend on using them again.Posted on Google Ettore BoggettoTrustindex verifies that the original source of the review is Google. Miguel gave me the best deal he could. The others did an excellent job instally everything. Thank you.Posted on Google Diane FurmaniakTrustindex verifies that the original source of the review is Google. Lisandro is a really good tech. And polite