To Request Service NOW Call: (219)627-1589

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? We can help you choose from a variety of top-quality HVAC systems, selected specifically for you home and needs, with extended 10 year warranties available.


Has your air conditioning or heating unit stopped putting out cold or hot air? Doesn't turn on at all? Only trained experts, like Illiana, can properly repair your home, or business, or church's HVAC system.


Regular maintenance of your A/C and furnace is crucial to ensuring the full lifespan of your system. Illiana's knowledgeable and trained experts have extensive experience in proper maintenance.

Duct Cleaning

 We use industry leading techniques to clean your ductwork thoroughly while minimizing the disturbance in your home

The relationship is central to our focus and means that we are concerned about more than just a quick fix.  We want to put our customers at ease that the technicians in their home are trustworthy and have their best interest at heart.  To help assure they are receiving the best possible service we now offer a No Breakdown Guarantee to all our customers that have a tune-up performed by one of our clean cut, uniformed, experienced, highly trained, and NATE certified technicians.  Those technicians will arrive at the home in a fully-stocked, clean, and well-marked company vehicle for peace of mind so each customer knows exactly who is coming to their home

To further inform our customers, we can send an email before we arrive showing a picture of exactly who will be coming to their home, along with a link to over 600 reviews from real customers just like them.  That direct feedback process lets us know just what kind of service we are providing our customers.  Customer Service is one of the most important and emphasized aspects of our organization and we do our best to make that evident in everything we do.  We offer extended hours emergency service in your home, but we also offer 24/7 appointment scheduling for maintenance on our easy to use and navigate website.  We don’t have a one-size-fits-all maintenance program either.  We offer multiple levels of service with monthly payment options to fit all budgets.  We also offer customized programs for your church or business. 

If your needs go beyond service or maintenance of existing equipment, we also offer the most reliable equipment available with the highest quality installation in the areaWe offer attractive financing options that you will learn about through our no-pressure, education-based sales process with one of our comfort consultants.  We will measure your home to determine exactly what it needs for heating, cooling, and Indoor Air Quality and present those options to you in an easy to understand format without any catches or hidden costs.  We offer attractive financing options to help you secure the home comfort system you need with approved credit.  Find more information here 

If you would like to schedule an appointement, need to request more information about our products and services, or are interested in installing a new HVAC comfort system or accessory, our finely trained staff is ready and willing to address all of your HVAC and IAQ questions and needs.

We Welcome Jim’s Heating customers. Illiana Heating is now serving everyone in the DeMotte Area with the same prompt and professional service they received from Jim. Please continue to call (219)987-2107.