Chicagoland’s Trusted Local Air Conditioning, Heating and Boiler Experts

Well, I initially called about my AC unit that died. It was repaired and cleaned by Peter. I now realize why the cleaning of my AC unit was so inexpensive. Peter had that unit look close to brand new. At this time I found out the unit was 22 years old and the furnace was not far behind. I thought th ...continue reading at due to the age of units I should pursue quotes on replacements. I met with Jonathan who provided me with proposals. I met the owner who added on some additional components that he thought would benefit my home. The end quote I thought was fair and reasonable. The new units were installed the following week. The crew that installed the equipment were extremely professional. I could tell they took great pride in their work. Their work was immaculate. I have seen installations of other type of equipment. Primarily in the world of telecommunications and I have never seen a cleaner installation. You all should be proud. If you couldn't tell, I highly recommend Guardian. Show Less

Guardian has been a fantastic vendor for me over the past year! They've installed a full system replacement after my prior one rusted out exactly 10yrs the to manufacturer date. I had a small service inquiry and they were able to come by the very next day to ensure the new system/investment is worki ...continue reading ng properly. Sergio was highly consultative and documented everything in case any future concerns came up. He gave me several tips to maximize the performance while also managing some of the noise I had called about. Great service, great experience and very happy to have them under contract for a while to make my HVAC worry free! Show Less

After a number of years looking into different options and companies installing Mini-Splits, Guardian was far and away the highest recommended, and I now know why! The team was efficient from initial call through estimates and all the details that go into such a decision. They were so kind about sch ...continue reading eduling and about arranging the installation to maximize our input. But most of all, beyond all else, I want to commend Jose and Will, the team that installed the units. They were careful, kind, thoughtful, and incredibly knowledgeable - and even though it was a busy holiday time, they attended to us efficiently and with the utmost precision. I cannot say enough wonderful things about both of them. They were consummate professionals, and lovely people. And the units have been a life-changer. Thank you so much to Jose, to Will, and to the whole team at Guardian! Show Less

The technicians were professional and courteous. They explained everything so we could understand, gave us a fair price, and got the work done in a timely manner. They were extremely neat. We are very happy with the new boiler.

Guardian is a top notch company and John is one of the most outstanding technicians I’ve ever worked with. He’s a trustworthy contractor who explains potential issues as he finds them, and breaks down the process of replacement so that anyone can understand it. I own 12 HVAC systems and I’ve ...continue reading seen more than my share of maintenance. I’ve used Guardian for years and these guys are simply the best. Show Less

Have used Guardian for years. Recently had a new furnace and central air installed and I couldn't be happier. I really trust them because the workers are always extremely knowledgeable, good problem solvers, and they explain everything in terms I can understand. The guys are always very nice, and ...continue reading respectful, also. Highly recommend Guardian Heating & Cooling. Show Less

Just had another great maintenance visit to prepare my old A/C units (2) for the summer. John was thorough and informative. Great job. I have used Guardian Heating for over 15 years. And my original Rheem furnaces(zoned heat) are still running! I use their maintenance contracts to get reminders, a ...continue reading dvance scheduling and discounts on annual furnace and A/C checkups/cleaning. They are always quick to respond to a service request. I highly recommend them. Show Less