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Deljo Heating, Cooling & Plumbing is a hvac | plumber serving Chicago, supported by 3204+ client reviews and a 4.9★ average, Deljo Heating, Cooling & Plumbing is among the most trusted HVAC contractors serving the greater Chicago area. One reviewer writes: "Same-day service was scheduled easily online and technician arrived exactly within time window." Gerardo earns praise for clear, timely communication throughout projects. Consistent track record of hitting deadlines and staying within budget. Reviewers highlight smooth, well-organized project management. Homeowners report project costs around $1,000 to $8,000. The return rate tells the story: multiple reviewers have used them more than once. They take the time to reply to reviews, which not every contractor does.
HVAC projects typically cost $3K – $15K in Chicagoland
Erik Gonzalez
197 reviews
Chicago
No recurring concerns found across reviews. This contractor maintains a consistently positive reputation.
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“After further inspection, Mike recommended and sold me on the fact that I should also replace my 20 year old furnace.”
“I called at 8 pm and the next morning at 9 am, Angel was at the condo.”
I called at 8 pm and the next morning at 9 am, Angel was at the condo. He ran tests, gave us a list of options, and fixed the issue within an hour and a half. Great experience overall!
Lauren Hammett
Jan 2026
“Jon was incredibly courteous, kind, knowledgeable, and professional.”
Jon was incredibly courteous, kind, knowledgeable, and professional. Spot-on diagnosis with issues conveyed clearly. Deljo is fortunate to have him on their team.
Geordie Kelly
Jan 2026
“My furnace man was very informative very polite and very concerned that the furnace was running...”
My furnace man was very informative very polite and very concerned that the furnace was running good perfectly before he left. I’m so grateful he came today on his very very cold day. Thank you so much. Great job.
Georgina Roy
Jan 2026
“Gerardo did a wonderful job.”
Gerardo did a wonderful job. He was very thorough and solved our issues during the coldest night of the year. The peace of mind that Deljo provides their customers is wonderful.
Carley Jamie
Jan 2026
“Deljo is the partner you want in a crisis.”
Deljo is the partner you want in a crisis. They do what it takes to solve the most complicated of issues. From the techs to the managers - A huge thank you to Greg, Kasey, Joe, Jesus, Ivan, Carlos, Tony, Jordan, and Max! who always had a plan to address our steam boiler issues. This crew of professionals have all stepped up in a big way. We appreciate your knowledge and dedication in getting our system operating optimally and reliably this winter season.
Jenny Floros
Jan 2026
“Angel was thoughtful, kind and knowledgeable.”
Angel was thoughtful, kind and knowledgeable. I’m so grateful for his expertise as he handled my system not working on a day with a high of 0 degrees and hope he’s the one who comes out here when the time comes to replace the whole system.
Meg Germino
Jan 2026
“Same-day service was scheduled easily online and technician arrived exactly within time window.”
Same-day service was scheduled easily online and technician arrived exactly within time window. Sam was extremely friendly and explained the issue with our boiler as well as potential solutions very clearly and honestly. Will definitely call on Deijo again and would recommend highly especially in times of emergency.
2769N KenmoreHOA
Jan 2026
“Deljo service was amazing.”
Deljo service was amazing! the technician was prompt and thorough and professional as well as a pleasure to have working in our house.
Hallie Metzger
Jan 2026
“This is our second time having Deljo's amazing technician Donny Gjoni come out, and it was a breeze...”
This is our second time having Deljo's amazing technician Donny Gjoni come out, and it was a breeze as much as any plumbing issue can be. He is an outstanding professional whose expertise are truly appreciated. Efficient, professional and kind! He explains and guides through the process with care, and the job is done expeditiously and excellently. Cannot recommend him more!
N P
Jan 2026
“Drew was on time, very personable and knowledgeable, and clean and respectful of my condo.”
Drew was on time, very personable and knowledgeable, and clean and respectful of my condo. During my service he explained any issues with my furnace and actually showed me exactly what he was seeing. He encouraged questions and provided great advice.
Matt Fisher
Dec 2025
“Joe arrived right on time and inspected our boiler promptly.”
Joe arrived right on time and inspected our boiler promptly. He explained that since the boiler was more than 20 years old, a new unit was recommended. He was polite and professional.
Edward Bury
Dec 2025
“Very timely and professional.”
Very timely and professional. Explained everything going on with my old system, no pressure sale and provided me options for a new system with installation. Price seemed very fair and Deljo was able to get a crew out for the install first thing the next morning. Very happy with the services
Zack Schmiesing
Dec 2025
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