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

Trusted Northfield HVAC Company You Can Rely On

When it comes to reliable HVAC companies in Northfield, IL, look no further than Deljo Heating and Cooling. We have been in business for over 100 years, thriving on the same business model we had back then. We treat our customers like family and provide premier heating and cooling services at every visit.

Do you need to have an HVAC inspection or biannual maintenance performed? Is your heat pump not working efficiently or do you want to upgrade your air conditioner? No matter what HVAC needs you have, Deljo Heating and Cooling is here to help.

Premier HVAC Installation and Repair

When your AC is cycling too often or your heater refuses to come on, you need to know you can make one phone call and rest assured the problem will be resolved in a timely manner. Our certified HVAC technicians have the knowledge and experience to properly diagnose and repair any air conditioning or heating system. 

When your system needs to be replaced or you need to have a new installation, Deljo Heating and Cooling has you covered. We can make professional recommendations that best fit your needs and budget. Are you considering upgrading to a high-efficiency system? We can help with that too. 

We carry the most trusted brands in the industry and guarantee 100% customer satisfaction with every install, upgrade, repair, or replacement.

Comprehensive Northfield Heating and Cooling

In addition to providing the top-tier HVAC service in the area, we can also help with indoor air quality, humidity control, water heaters, and smart thermostats. We offer combination packages that help maximize your home comfort all year ‘round.

Over 100 Years of HVAC Experience

Deljo Heating and Cooling has been providing HVAC services to Chicagoland residents for over a century. We have always taken pride in our high rate of customer satisfaction, and we have our meager beginnings to thank for that. We started as a small family business based on honesty, fairness, and the highest-quality service possible. That tradition has built our reputation, and we have our customers to thank. 

When you need heating and air conditioning service for any reason, give us a call. We offer 24-hour emergency HVAC service because we care about your safety and well-being. If your heater goes out at 3 a.m. on a holiday or your AC stops working in an August heatwave, we will be there as soon as possible because your comfort is our top priority.

Trust the professionals with a century of experience and call Deljo Heating and Cooling for all your HVAC needs.

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