Website
Call
Illiana Heating & Air Conditioning
Illiana Heating & Air Conditioning is your complete source for heating, air conditioning and indoor air quality products and systems. Why choose Illiana? From the moment your phone call is promptly answered by our friendly and knowledgeable staff, you can tell that Illiana Heating & Air Conditioning is a different kind of contractor.

Being family owned and operated for all of its almost 30 years means that you benefit from a legacy of Quality, Value and Integrity. That integrity is based on a Christian faith shared by ownership and management and permeates all aspects of the business.

That foundation is the beginning of the relationships we build with our customers and team members; the Illiana Family extends outside the walls of the business to touch many lives in the community.We proudly serve most of South Chicagoland and Northwest Indiana with HVAC services. Air conditioner or heater broken beyond repair?
Services
Family owned and operated, Illiana Heating & Air Conditioning, Inc. has been serving Northwest Indiana and the South Chicago suburbs for over 30 years. Christian owned and operated, we always do everything we can to make our customers part of the Illiana family. Illiana Heating & Air Conditioning is Northwest Indiana and South Chicagoland Illinois's complete source for heating, air conditioning and indoor air quality products and systems.
To schedule a future maintenance appointment, please use our maintenance calendar here: Maintenance Calendar. NEW! Real-Time appointment scheduling option. Please note: You are only able to schedule more than 5 hours into the future. If you need service sooner than that, please call at 219-627-1589.
That's how you'd describe our family of services here at Illiana Heating & Air Conditioning. For over 30 years, your friends and neighbors have counted on our no-nonsense approach to servicing South Suburbs & NW Indiana's heating, ventilation and air conditioning needs. Our service fleet utilizes the latest diagnostic technologies to quickly and efficiently determine the nature of your service problem.
Let's face it. There are a lot of homes in the Chicagoland and Northwest Indiana area that simply aren't comfortable. Most use more energy to heat and cool than they should. Many have terrible indoor air quality. Why? Because too many heating and cooling systems have been thrown together and too many corners have been cut.
The most common cause of system breakdowns is a lack of maintenance, and the most common culprit is dirt. Dirt that builds up in the indoor coil that sits above your furnace that isn't caught by your air filter and the outdoor coil on your unit that lives in the elements 24/7/365. Dirt makes your air conditioner less effective at cooling your home and less efficient with the energy it consumes.
Reviews (21)
David Silva
David Silva
Jan 02, 2022
Report
Positive: Professionalism, Punctuality, Quality, Responsiveness, Value
I've used Illiana in the past before moving to another state. I've just returned to Indiana and Illiana was my first choice for quality maintenance of our HVAC system. Our technician, Tony W, had actually serviced our previous home over 10 years ago and he remembered us! That's customer service!
Services: Cleaning, Heating maintenance, Heating system repair
Marc Schmidtke
Marc Schmidtke
Dec 30, 2021
Report
Positive: Professionalism, Punctuality, Quality
They arrived on time, Friendly, knowledgeable. Have used them for 10 years and have always been satisfied
Services: Cleaning, Heating maintenance
Kaleb McCullough
Kaleb McCullough
Dec 27, 2021
Report
Positive: Professionalism, Punctuality, Quality, Responsiveness, Value
Jeff D was fantastic. A quick diagnosis and a fast part run had our furnace up and running again. Super professional and easy to talk to. Signed up for their yearly maintenance plan!
Service: Heating system repair
Florence Andrzejewski
Florence Andrzejewski
Dec 13, 2021
Report
Positive: Professionalism, Punctuality, Quality, Responsiveness, Value
Been using this company for a number of years. Honest, trustworthy and great services. Excellent service men, polite and knowledgeable. Trustworthy company!
Service: HVAC maintenance
Vito Mannino
Vito Mannino
Dec 13, 2021
Report
Tony arrived on time and was very professional. Kept us informed on the cleaning on the furnace. He also found an issue with humidifier and repaired that. Excellent service.
Services: Cleaning, Heating maintenance, Thermostat installation
Christopher Stewart
Christopher Stewart
Dec 01, 2021
Report
Positive: Professionalism, Punctuality, Responsiveness, Value
Soon as the weather turned cold my boiler quit working. IHAC sent out Kevin a tech with 23years of experience. He quickly diagnosed and resolved the issue. They were quick and very reasonable for an emergency call out. Highly recommend!
Service: Heating system repair
Julia Quilici
Julia Quilici
Nov 24, 2021
Report
Positive: Professionalism, Punctuality, Quality, Responsiveness, Value
We had a humidifier installed. Zak was polite and professional. This was our first time using Illiana Heating and Air and we would definitely use them again in the future and recommend them to friends and family.
Richard Kouder
Richard Kouder
Nov 22, 2021
Report
Positive: Professionalism, Punctuality, Quality, Responsiveness, Value
This is a business that makes every effort to satisfy their customers. Every person I have had contact with including management, technicians and office staff are cordial, polite and efficient. I highly recommend this business and suggest you give them your business.
Services: AC repair, Heating maintenance, Duct and vent cleaning, Heating system repair
Jim Bruner
Jim Bruner
Oct 18, 2021
Report
Positive: Professionalism, Punctuality, Quality, Responsiveness, Value
I had a great experience with Iliana heating and cooling. They did a fantastic job! Thank you to Michael in sales and thank you to Jeff and Jake for a fast and smooth installation of my new furnace and air conditioner. Great job by all!
Amy Putman
Amy Putman
Oct 16, 2021
Report
Positive: Professionalism, Punctuality, Quality
Very professional. They were always on time. I loved that they texted you to let you know they were on their way and having the ability to track location. It was a quick and easy process. Very competitive with pricing and offer a great product. Highly recommend.
Service: Installation
Patrick O.
Patrick O.
Jul 09, 2020
Report
Michael came out to the property and told us the compressor was shot and we needed to replace the AC. He looked all through the house, gave us a ballpark estimate, and said he'd send an official quote via email. That was 10 days ago. We've called the main line several times, spoke with several receptionists (Michael is always out onsite - never taken our call) asking for our quote. They've never been able to send it. We've provided multiple email addresses - nothing. I can't say I've ever been ghosted by a company I'm looking to pay $5k to for a new AC. Entire
Patrick O.
Patrick O.
Nov 13, 2019
Report
I can't give a zero, but would if I could. furnace broke and they called to say a 3:30 appointment, but it is overtime.

Find another company.
Steve S.
Steve S.
Aug 23, 2019
Report
I called them for an estimate for a new heating & cooling system. They sent a couple of technicians to look over the job. They were both polite & seemed professional but I never did receive an estimate. I wouldn't mind except that they charged me $89 for the estimate. I suspect the job was more than they could handle. Since then I've received free quotes from other company's.
Lisa B.
Lisa B.
Apr 03, 2019
Report
We purchased our home in January. The furnace was only 2 years old. We called Illiana Heating since they are the ones who put it in and it was still in warranty. They would not grant the the manufacters warranty since the previous owner no longer lived there. We called another heating co and they were more than happy to grant the manufacturers warranty. I still don't understand why you do the work and give out a warranty and then refuse to grant it when something goes wrong.
L. R.
L. R.
Dec 12, 2018
Report
I recently posted something on Nextdoor looking for recommendations on the installation of a humidifier. We called a few places and decided to go with Illiana, mostly because the prices were all about the same and there was a $50.00 coupon in a flyer. So yesterday afternoon, mind you not even 24 hours later and there is a new coupon in this morning's Times for $100.00. So my husband called to complain about that. But the manager said SORRY can't give credit on work already done. I think that is bad business and for that I would never recommend them to anyone.
Ken C.
Ken C.
Sep 29, 2017
Report
A couple weeks ago I had Dan from Illiana heating and air conditioning out.
I wanted to be proactive because my furnace and air conditioner was about 20 years old.
I went with a new 95% efficient furnace and a compressor for my air conditioning. The installers came out and put it in in one day, everything looks great , we had a little problem with an off-color diffuser but I spoke with Dan and he worked to find the right one. once he found it he sent his guy out take care of it right away everything looks good and works good I definitely would use Illiana heating and air conditioning again.
Bill B.
Bill B.
Jul 11, 2017
Report
We have been customers of Iliana Heating & Air Conditioning for over 25 years. Their customer service is excellent, and everyone who works for this company is professional, highly skilled, and always so kind and helpful. We are members of their Gold Star service plan, which we highly recommend. All in all, Iliana is a reliable and trustworthy company. We wouldn't even consider using anyone else for our heating and air conditioning needs! Definitely the best in this area!
Missy M.
Missy M.
Jul 06, 2017
Report
I can't think of any reason why to give less than 5 stars. Rick, Kevin and Mike installed a new furnace, a/c, and water heater today.....it was a big job that took all day, but that didn't keep my husband and I home on a beautiful summer day......we felt confident leaving our home (and cat) in their hands. Thank you Illiana for being so professional, your customer service is amazing, and this is one satisfied customer. I will highly recommend you again.
Richard C.
Richard C.
Dec 05, 2016
Report
Right on time, professional and efficient. Always a job well done by these folks. Thanks and see you in the spring for AC checkup!
Joe M.
Joe M.
Mar 20, 2016
Report
Mary V was very helpful & responsive. She asked when available and my response was tomorrow. Didn't freak out just asked what time! Called and sent email advising when tech was on his way. Tech Kevin was very thorough and informative. Realized previous furnace cleanings from other companies weren't half as thorough. I am looking forward to having Kevin go thru my air con when time.
Matt N.
Matt N.
Jan 29, 2014
Report
We heard a loud noise coming from the furnace two mornings ago and the house smelled like a burnt motor, so we turned the heat off (It was 16 below zero outside). After calling a technician responded promptly within 3 hours. We thought the blower motor went bad...well it did...and there were cracks in the heat exchanger and condenser. Oh no!

Within 20 minutes Dan was at the house discussing options for a new furnace. Two days later, after Kevin did a fantastic installation the house is warm again. They arrived promptly at 8AM, took about 3 hours for the install. The technicians were extremely