Customer Testimonials

One of the best compliments we can receive as a company is a referral from one customer to another.  Sometimes people even take the time to let us know how they feel.  Below are some exceptional excerpts

Some of our customers have asked where they can review us in addition to our customer satisfaction surveys.  Below is a selection of sites around the web you can use to spread the good news about Illiana Heating & Air Conditioning, Inc.

If you want your review to appear below on this page, us our Contact form to send it to us directly.

Visit our Google+ Local page and leave a review:

Feel free to mention us on Twitter @illianaheating

or post a review on our facebook page:

I was very satisfied with every step of replacing my 30 yr old AC. It started with a call to a very welcoming receptionist call... to Gary's arrival for analysis/assessment thru installation all in the same day service. Easy payment options were explained. I never felt pressured. Rick and his helper (sorry forgot your name) displayed genuine customer service, patience (with my many questions) and kind professionalism. I prayed on finding the right company and I am so thankful to have called Iliana Heating & AC, Inc.


No more Russian repair roulette...

No more Russian repair roulette trying to find a reliable and trustworthy company to deal with when you need service! Illiana is the only company I will call from now on. I was so pleased with their service and the friendliness and competency of Raul our repairman, I signed up for the annual maintenance plan and I am glad I did! My Air Conditioner just needed repair and Raul was here to get it all up and running again! And I got the Gold Plan price on the part. :-) Also, it's so nice to have a company that actually answers their phones with real live people. Highly recommend this company for all your heating and cooling needs!

- Debbie O

I will simply say that it was delightful working with Kevin P. He did the work, I did the learning. He is so knowledgeable. He knows the science behind the machine. I learned a lot. All of it helpful, because I like to know how things work. He also gave me simple tips how I can help maintain the machine (air conditioner) in good order. He gets lots of stars and lots of thanks

- Loraine T

lots of stars and lots of thanks

Re: Jeff, Zak, Kevin.  


Do want you to know that you men did a great job for the Nederhoods yesterday.  This is not hyperbole:  we really do believe that this equipment and the way it was installed is going to have many advantages for us and for the house we live in.  So, five stars for each of you.  You are a credit to Illiana Heating, and your punctuality, courtesy, and skill display your desire to bring honor to our Savior whom we worship in this holy week.

- Joel and Mary Lou N in Lansing, IL

We had Illiana out to replace our A/C and furnace. Our service technicians, Kevin and Rick were prompt and professional. Kevin was very knowledgable about our system and explained the system's benefits and proper operation. He took the time to answer all of our questions. We would like to add that the pre-installation process was exceptional and it took less than one week from start to finish. We are very pleased with the system and would highly recommend Illiana to anyone looking for heating and cooling assistance.


Gary has a vast understanding of the HVAC business. He goes about his work in a very professional manner and answers any questions you may have. He is a very friendly people oriented person. Illiana always calls about a reminder that service is due and accommodates scheduling to the customers desires. I find them very affordable and use their Goldstar contact program which I feel is well worth it. I would highly recommend both Illiana and Gary. Gary is surely an asset to Illiana. Illiana has always exceeded my expectations over the years that I have had them. Keep up the tradition!

- Mike K

Over the years my husband and I have been extremely happy with the service that Illiana Heating provides. The entire staff is such a pleasure to deal with whenever it comes to scheduling or any questions that we may have regarding our furnance or air conditioning. A huge thank you to Chris M. He represents Illiana in a positive way...professional and polite. Thanks Chris.

- Dawn B

As always very pleased with the service that is provided with Iliana heating and air-conditioning. Tony, went the extra mile gave me some helpful hints. Very professional spend time cleaning out my furnace, and good advice. I also posted on Facebook how pleased I am with Iliana and a helpful hint that Tony gave, about changing your battery in the thermostat. Did not know that thank you

-Paulette Y

I was extremely satisfied with Illiana. The helpfulness in setting up the appointment and the service technician were helpful and informative. Raul S. was prompt and courteous. He reviewed all of the inspections and the results explaining result before the cleaning and the after. Mary V. was very helpful on the phone when we set up the appointment. We have been very happy with our furnace and we are on the Gold Star program.

 - Kevin G

We had a great experience on Jan. 21, 2016 when Jeff B. from Illiana Heating and Air Conditioning installed our new AprilAire humidifier. Jeff was right on time and worked diligently to complete the installation in a careful and timely manner. When he was finished he clearly explained the new equipment and the new digital control panel to us. Jeff did a great job. We appreciate his experience and friendliness. We have been satisfied Illiana customers for several years and will continue to call them for our heating and cooling needs.

-Peter and Susan K

Exceptional work & people to deal with. Casey O is very professional,knowledgeable, courteous & above all very reliable. No mess, no fuss kind of guy, down to earth. The staff all make a great team. Service is the best in town. It would be a mistake not to choose Illiana Heating & Air.

-Anita S

Jeff B & Jarrod did an excellent job installing a much needed new natural gas furnace today. Both were very knowledgeable and answered all of my questions. Both gentlemen were courteous and friendly. After installation clean-up left my basement neat and clean. Thank you guys for your excellent work and friendly attitude. Explantion of the new furnace and theromostat operation were articulated with detail and clarity. Thanks!

-Pete M

Card received from Goldstar member, Carolyn in DeMotte, IN

I just want to express my appreciation of your service, including the girls that call and answer the phones.  Any of your service techs have been very nice and helpful, explaining what he has done at his service call.  The last couple of calls have been done by Raul Solis – very nice young man.  I am very pleased with your company!

I just want to thank you for all your help when I needed it! I was at a loss of who to call to have my furnance checked after waking up to a house at 61 degrees a week ago. I was so stressed thinking I was going to have to buy a new furnance and not knowing where to get the funds or if it just needed to be cleaned. I appreciate you explaining the Gold Star Membership to me. Your tech (didn't get his name because I was freaking out) was just awesome! He explained what he was going to check and what he was going to clean, and I was expecting a guy to come in thinking stupid woman! He couldn't have been any nicer and helpful! If anyone asks who I called I am so going to tell them Illiana Heating!!! You and your tech put me mind at ease and now I can leave my home knowing it will be warm for my pets! Thank you again so much!!!!!!!!

-Edith in Cedar Lake

Thank you, thank you, thank you. We purchased our home 1 year ago, and right away had a problem with the Mitsubishi Electric Mr. Slim cooling and heating unit that was installed by Illiana. Not being from this area, we called to have it repaired, and the service man went above and beyond our expectations when servicing the unit, and it has since been working great. So this fall when we started having problems with our boiler, we decided to call Illiana again. Kevin, the service man, came out and diagnosed the issue, and today completed the repairs. Since my knowledge is very little when it comes to boilers, Kevin took the time to instruct me on proper boiler care and maintenance. Because of Kevin, Steve, and the helpful office staff, you now have new loyal customers. JOB WELL DONE!

-Lee and Rachel in Griffith

Thank you very much for your help during our recent furnace problem.  We really appreciated all the help and service we received beginning with your office staff, technician repair servicemen to your sales representative.  Everyone was cordial and understood the dilemma we were undergoing with no heat in our home.  We are very appreciative of your quickness in service that you provide.  You’ve been right there, helping out wherever and whenever needed during these cold frigid months.

The new furnace is keeping us warm these days and I am a very satisfied customer.  We will highly recommend your company to our family and friends.

Thank you again

A very satisfied customer,

Luis and Yolanda S, Cedar Lake

Attention K. Frump, General Manager

Dear Sir

I am sure you are aware, but I want to reiterate that your technician who cleaned our ducts and vents did an outstanding job.

My husband, Louis, and I have resided here at our townhouse cooperative for the past 24 years, but this is the first time we have had our ducts and vents cleaned.  We were unaware that such a service even existed until this year.  We have received numerous flyers, telephone messages, and mail, from a number of companies wanting to discuss cleaning our ducts and vents.

When your man was out earlier in the week to service our air conditioner, my husband (being a senior and a retiree who can really talk) began questioning him about his job responsibilities.  We could see from his performance that he was thoroughly interested in the job he was performing.  Upon realizing that duct and vent cleaning was one of his areas of expertise, my husband quickly decided that he was the person we wanted for that job.  I believe Illiana has been the company servicing our heating and cooling systems here at the Co-op for the entire 24 years we have lived here.  This automatically makes your organization more familiar with our heating and cooling systems than any other company.

As chairperson for the Co-op’s “Wise Ones”, the social senior group here at the Co-op, I will personally be advertising to as many members as will listen to me, just how much dust, dirt, and grime was actually removed from our system.  I will further inform them of the excellent job your man did, so be assured they may be personally be requesting him for their unit. 


Louis and Gwendolyn G in Calumet City

Barb B of Crown Point writes:

I have a furnace/air conditioner unit less than 5 years old installed by another dealer.  I have had service calls on both the furnace and air conditioning units 2 times each season.  Enough already.

I called Illiana to fix and maintain my system from now on.  What a difference!  The technician was knowledgable and nice.  Checked different gages inside and out.  He spent time diagnosing the problem.  

I now have Illiana Heating and A/C on my list of Go-to service men.

Thanks you. Thank you.

Service tech was very courteous and polite. He did a good job.

James in DeMotte

It was enjoyable to have a tech come in and not be just a “tech.” He was open and friendly, kept me appraised with this job, and, more importantly, kept me relaxed and confident I had chosen the right company to handle my furnace.

Cheryl in Dyer

Every technician that has come to my house has been honest and trustworthy. Very nice company to deal with.

Dale in Schererville

Illiana Heating and Air Conditioning Co. is a Christian-run company. We respect that. People in the office are very good. Service men are very knowledgeable. They get the job done right.

Thank you,

Gary in St. John

We now use Illiana Heating for all our heating/cooling needs and have sent much business their way. They are pleasant, honest, competitive, and reliable people!

Angie in St John

Everyone we have dealt with from the owners to their employees is friendly, professional, and knowledgeable!

John in Lowell

Integrity, skill, character of office and work staff are excellent. Fast and great service yet friendly and positive nature of all involved. Couldn’t be happier with whole crew!

Gerrit and Judy in Lansing

They did a great job and I was well pleased with their service.

Glen and Tina in DeMotte

Illiana has been our “call to” people for a number of years. They are always reliable and trustworthy. This call was due to the humidifier pump going out, but it was repaired in a timely manner.

Marie in Lansing

The straight-up recommendations for a solution were most welcomed. No oversell, just facts and options. Honesty is BIG with our decisions.

Debbie in Schererville

Felt very trusted in the work, was very well satisfied.

Elaine in Lansing

We have had great service from Illiana Heating and Air Conditioning for many years. We would highly recommend their business to anyone.

Edward in Chicago

Receptionist that answers phone in Cedar Lake office is GREAT—nice, friendly, helpful! Lucky to have her!

Cindy in Cedar Lake

Even though the weather and road conditions were very poor, they were very prompt. Also the office and the guys in the shop were very friendly and helpful.

Michael in Wheatfield

The service is the best. The servicemen are always confident and call to let me know exactly when they come.

Dorothy in Dyer

ur home is 45 years old and never had the ducts cleaned. The two young men who did the work were very careful in our house. They did a great job.

Larry in Dyer

The girls in the office are polite, kind, and helpful. When I ask them to send Tony (he is great), Tony is here every time—and is VERY knowledgeable.

Joyce in Riverdale

Was very happy my air conditioner was working again. I will again if needed.

Phyllis in DeMotte

Nice product, good heating and air company. Very satisfied.

Larry in St John

Very good with all involved. Thank you so much!

Rosemary in DeMotte

Very satisfied with my overall experience. Have recommended American Standard to my friends.

Cindy in Highland

I was surprised he showed up on time at 8 o’clock on a Monday morning after we had major drifting of snow from a snow storm over the weekend.

Richard and Gloria from Wheatfield

Tech was actually early and made the rest of my day easier.

Marla in Wheatfield

Pleased with service, very friendly!

Cheri in Crown Point

Did very good work and very clean.

Claude in DeMotte

Very prompt and professional.

Lisa in Lowell

I will be getting a service contract because I was very happy with the service.

Valarie in Schererville

My experience with Illiana Heating has been very positive over the years… Very trustworthy!

Richard in Lansing

We had Kevin from Illiana Heating and Air Conditioning for heating. He was very knowledgeable and very thorough. We had Rob for air conditioning. Very pleasant and very considerate. We have also had Tony. Also very good, neat, pleasant, and knowledgeable. Thank you!

Anna from Lansing

A nice young man found the problem quickly and fixed it. We were very glad to have our air conditioning working again!

Sharon in DeMotte

I always have Gary take care of my heating and air conditioning. I always trust him.

Patricia in Dyer

Illiana is always helpful, kind, and understanding. They always do as they say and are always on time.

Jerry and Joyce in Lansing

Good office staff, always accommodating.

Sandra in Dyer

Great service from a great company.

Cheryl in Highland

The service man was very nice, he explained the problem (with a/c), and explained the maintenance agreement to me.  Very knowledgeable.  I would use your company again.

Delores in Cedar Lake

Love the company ~ love the workers that answer phones and come to the house!  I always recommend them when someone asks for a  good heating and A/C place J

Victor in Munster

This was one of the nicest servicemen I have come across.  When we need a new furnace I hope I get the pleasure of having him install it.

Kathleen in Thayer

I have done business with Illiana Htg & AC for several years and am always satisfied!

Harriet in Munster

Everything has worked fine since they came.  It's a relief to know there are GOOD company in the business today.  

Tom A of Dyer writes:

I truly believe that Kevin Parsley is one of your very best techs.  He is so thorough.  I would highly recommend him to anyone and you better beleive that I will always request him to day any work that I would ever need!

Patricia B of Calumet City writes:

Thought your service man was the greatest thing going.  Really didn't have to wait long for him at all expecially in the heat.  Knew what he was doing.  Would recommend you people to everyone.

Mr. B of Cedar Lake writes:

Have YEARS of positive experience with Illiana HTG/AC INc.  Enjoy their christian witness to the community!

Robert B of St. John writes:

Our Overall Experience was EXCELLENT!

Greg & Laura of Calumet City writes:

Always nice in person and representative always friendly when setting up appointments

Ashley D of Highland writes:

We love Illiana Heating & A/C.  They are by far the best around!  Keep up the great work! :)

Mr. A of Dyer writes:

Very Good Service.

Mrs. N of Calumet City writes:

Great Job Illiana Air

Francine V of Lynwood writes:

We were in the middle of a heat wave.  I was in a wheelchair and on crutches because of a leg fracture.  You saved my life.  Thank you.

John T. of Lowell writes:

Very pleased with the person who came out and his work.

Mark M. of St. John write:

Have used their services for about 3 years.  Manufacturer of my water heater had a recall on a part and called Illiana as they are local company.  Liked how they handled that problem and have used them ever since and have recommended them to all my neighbors and friends.  All have used them and have been very satisfied. 

Aretha M of Calumet City writes:

My technician, Dan, is one of the most knowledgeable people I have met.  He explains and answers all questions, always polite.  Great Job!!

p.s. Will continue with your service

Fred M. of Lynwood writes:

I thought, because of the extreme heat, my A/C would not get fixed for days.  Illiana Htg & A/C Inc. was able to check my system and order the needed part in a timely manner.  My maintenance agreement was expired, but I renewed for the coming year.  Illiana has cared for my system for years and I am satisfied.

Chester Z. of Lansing writes:

Very good work done on repairing the air conditioning.  The contractor knew what was wrong the minute he looked at it.  Very good quality work.

Stan D. of Rensselaer writes:

We have dealt with Illiana Heating and Air Conditioning for over 25 years.  They are the best, wouldn’t use anyone else!  Always prompt, professional and totally trustworthy.

Mark of Fair Oaks writes:

Very please that it could be done the same day I called. Enjoyed the contractor who was like company J Very polite and sociable! He made the unexpected expense not as painful J

Robert W. of Lansing writes:

“I have been dealing with Illiana for 16 years they still have my complete confidence.”

John S. of South Holland writes:

“Outstanding company to do business with – very, very committed to serving and providing excellent care.  I would recommend them to any and all –and do!”

M.D. of Thornton writes:

None better than Illiana Heating & A/C, Inc.”

Rose R. of Dyer writes:

“Awesome technician, Kevin, like HVAC Doc.  Very respectful and friendly!

Mary was awesome too.”

Jennifer C. of DeMotte writes:

“The technician, Rob, was very friendly, knowledgeable and did the extras for my a.c.unit.  He cleaned the bottom of the unit with our extra hose and got all the cotton wood seeds out.  Filled 2 pounds of coolant & fixed the main issue which was a burned out wire.  I appreciated his knowledge and efficiency.”

M.C. of Calumet City

“I have always been very satisfied with Illiana since I started doing business with them many years ago.  They have always been very helpful with all my problems.  I would highly recommend them to anyone.”

Rose M. of Oak Lawn writes:

“Overall good experience.”

all went well. your installers were very professional and informative. they answered my questions willingly and seemingly completely. Last nite was sooooo nice upstairs! I, too, hope it brings us years of problem free comfort!!!

-Carolyn in Highland

I am so impressed with this system. I've always kept my window units at 74 degrees. I put the new system at 78 and came home to a very comfortable house. As a matter of fact, I had to increase the temp to 80 degrees in the familyroom. The dogs were cold.

My neighbors have all been to my house to see the new system and are quite amazed at it. I feel much safer in my home without those window units too.

Brad and Kevin did a wonderful job. My father was a pipe fitter. He said you could tell a good service man if he left the job clean and the guys did just that.

All in all the entire experience with the installation and the operation of the system has been a wonderful experience. I'm sure as people learn about this system it will become quite popular.

-Judy in Griffith

Illiana H&A is a competent, reliable, and responsible company. Thanks You!

Illiana Heating and A/C is the greatest. I’ve been with Illiana for many years. Very satisfied with their service technicians and office personnel.

-Loretta in Lynwood

Dealing with Illiana Heating and cooling was a good experience. They were very helpful with scheduling and solving my problem. Satisfied Customer.

-Tom in Wheatfield

Very Polite & Explained everything. Best company in the area. Thank You!!

-Bonnie in Cedar Lake

Illiana Htg and A/C Inc. is a very reliable and dependable company. They do a thorough job. Each service man is well trained and very knowledgeable. My wife and I are very satisfied with Illiana Htg and A/C. And a big plus to us its run by God fearing owners

-Gerritt in St. John

Illiana was recommended to me as a “Christian Operated” business, which may not be necessary, but is certainly appreciated. The service tech Gary was great, friendly, and knowledgeable

-Jennifer in Lowell

The technician was great, friendly, listened well. Was very satisfied.

-Marybeth in Lansing

I live down the road from your office and you always have inspirational messages on your board.  The messages are a small message of how you are as a person so we decided to try out your business.  I'm so glad we did.  You came to the house earlier than expected and my husband was happy with the service.  We love supporting our local businesses.  I would highly recommend your business to anyone that needed your services.  We may need a furnace soon so we will definately be contacting you!

-Jessica in Cedar Lake

My mother passed away.  Illiana called to set up her regular Goldstar maintenance.  The house had been sold, so they offered to perform teh service at my house.  I have been a loyal customer since 2005!

-Sharon in Schererville

Illiana Htg & Air over the years has always given me complete satisfaction.

- Augustine from Lansing


We just wanted to let you know how pleased we are with Illiana Heating and Cooling.  We appreciate the professionalism of your staff members, the quality of the products we received and the fact that your company is family owned,operated and a Christian company.  Making a large purchase such as a furnace and and air conditioner can be intimidating and we are grateful that we made our purchase with you.  The installation was as close to perfection as you can get.  The quality of the equipment is superb and exceeded our expectations. We were very impressed with Dan and Illiana from the get go.  We will certainly recommend you and your company and we will keep you in mind for any future purchases or services in heating and cooling.

May God bless your company.


Debbie and Jim from Highland, IN

We decided to replace an old but working heating and air conditioning system to take advantage of the federal tax credits.  We received four bids for the work and Illiana was on the higher side of the four bids but not the most expensive.  The sales rep came out to our house, evaluated the project and took measurements.  He explained the different options and gave us a good, better and best alternative.  He also explained the tax credits and helped us understand what we needed to qualify.  We received his bid by email within a couple of days.  We spoke several times as we navigated through all the estimates.  We decided to go with Illiana as they had the best mixture of quality product, flexibility and reasonable price.  They also had the best guarantee.  I left for work on installation day early in the morning and the workers arrived promptly at 8:00 AM.  When i returned home in the afternoon, they had completed the job including replacing the hot water heater.  I was amazed that they did not leave any mess.  In fact, if it wasn't for the new equipment, you wouldn't have known that they were there working.  I also appreciated the nice install job that they did in that they tied off all the wires and did a thorough job of caulking the openings.  The whole process from estimate to install was just completely painless.  They were very easy to work with and we are completely satisfied.  We now have been through all four seasons with the new furnace and air conditioner and haven't had one issue with them.  We are seeing the savings that they had estimated in our electric and gas bill.  The units are very quiet, easy to operate and haven't given us one problem.  We are completely satisfied with their work and would not hesitate to recommend them.

Robert in St. John, IN

Everyone at Illiana has always been courteous and friendly. I have been with Illiana for about 22 years. I have always found them excellent at their job and will continue to use their services and would recommend them to others

Elizabeth in Lansing, IL

Michael M. of Oak Lawn writes:

“Gary services our heating and A/C every year and is a great employee.  He is very knowledgeable and very professional.  Thank you!”