$200 OFF Special price for Installation of a replacement Humidifier read more

HVAC Service in Chicago

If your house seems warm enough in winter and cool in the summer, you might well ask why your HVAC system needs any service. Actually, there are several reasons, and Deljo Heating & Cooling offers the very best HVAC service in Chicago.

Here are just a couple of reasons why you should have your HVAC system inspected and cleaned on a regular basis.

Energy Savings

According to the U.S. Department of Energy, 25 to 40 percent of the energy used for heating or cooling is wasted. Contaminants in the heating and cooling system cause it to work harder and shorten the life of your system. When your HVAC system is clean, it doesn’t have to work as hard to maintain the desired temperature and less energy is used.

Indoor Air Quality

Airborne contaminants, such as dust, dander, bacteria, mildew, decaying organic matter, viruses, residue from chemicals, pollen, and much more, get pulled into your ductwork every time your system is on. If you and your family are having issues with allergies, asthma, respiratory illnesses, or even frequent cold symptoms, it could be time for air duct cleaning.

So, even if haven’t noticed any heating or cooling issues in your home or office, you should call Deljo Heating & Cooling and let our expert technicians inspect, clean and, if necessary, repair your HVAC system.

HVAC Inspection

An air duct inspection determines if there is a need for cleaning and the level of cleaning that’s required. We also perform an air duct leakage test, a first step for proper air duct cleaning. We report our findings back to you before we go forward with the cleaning. This test is important to prevent the same issues from happening again once your air ducts are properly cleaned.


After their inspection, our technicians will give your HVAC system a thorough cleaning, and all dirt, grime and contaminants are collected in our equipment for environmentally safe disposal.


Unless they are properly installed, your air ducts will not stay clean. Our technicians can correct installation problems, making sure your system remains clean and is running efficiently for years to come.

Financing Your New HVAC

We understand that the final price tag of a new system might not fit your current budget. That’s why we’re please to offer finance options if needed. Please contact our customer service team today to learn more about breaking up the payments of your new system.

Addressing Your All of HVAC Needs In Chicago

Rest assured that all of our NATE-certified HVAC technicians are trained, insured and will act professionally during your appointment with us. Your time and comfort are of the utmost important to us, which is why we will arrive and operate in an timely and efficient manner.

We’ve been Chicago’s premier HVAC contractor for almost 100 years because of the quality of our services and professionalism of our certified technicians. Whether you need an HVAC tune-up or a completely new HVAC unit installed in your home, Deljo’s technicians will make sure all of your questions and concerns are addressed before we leave.

At Deljo Heating & Cooling our expert technicians are also available 24 hours per day, 7 days per week for emergency HVAC services. We urge you to email or call us at 773-829-4295 for the very best HVAC service in Chicago.

Client Testimonials

Read the opinions of our satisfied customers.

I always use Deljo. The entire staff is amazing from intake calls to install. They were fast, professional and gave us a fair price.

Monica OConnor Chicago IL.

Joe was great. We came home to a cold house on a Sunday night and he came out to diagnose the issue right away. Very knowledgeable, very friendly.

Kyle Sant Chicago IL.

We’ve been using Deljo for several years and have had a great experience with them. They’re prompt, reliable, and trustworthy. The technicians (David was the most recent) have been great.

Ari Telisman Chicago IL.

My hot water heater had some leaky pipes due to corroded unions. The repair took longer than I thought due to some unforeseen circumstances. Unfortunately after the repairs the water heater stopped working...

Maria Pradd Chicago IL.

Questions? We Can Help! Contact Us Today!

Our Service Areas

Contact Deljo Heating & Cooling today. We look forward to hearing from you and helping out with all your indoor comfort needs.

Chicago Suburbs

Chicago Neighborhoods