STI Heating & Air Conditioning, located in Schererville, IN, is your local, trusted source for all of your heating, air conditioning, and geothermal needs. Our technicians have over 20 years of experience providing residential and commercial heating and air conditioning service to Lake and Porter Counties and the surrounding area. Do you need geothermal HVAC or custom sheet metal work? We offer those services as well. We are licensed, bonded and insured and we stand behind all of our work. We also offer free estimates on new installs and financing is available. Call today to set up an estimate!
Location
Certified by STI Heating & Air Conditioning • Apr 26, 2026
Certified by STI Heating & Air Conditioning • Apr 26, 2026
Monday8:00 AM - 4:00 PM
Tuesday9:00 AM - 5:00 PM
Wednesday9:00 AM - 5:00 PM
Thursday9:00 AM - 5:00 PM
Friday9:00 AM - 5:00 PM
SaturdayClosed
SundayClosed
Reviews
5.0
9 reviews
5 stars
9
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Cary Hmurovic
Mar 26, 2026
5.0
Great people to work with absolutely love supporting family owned businesses. These people are fantastic.
AE
A E
Jul 23, 2025
5.0
STI Heating & Air Conditioning saved me so much money! I had another HVAC company looked at my central air unit because it was blowing lukewarm air. The other company told me I needed a new compressor for $1699 and they took only cash. After a repairman ran off with $453 of my aunt's cash, I decided I did not feel comfortable giving the HVAC repairman $2000 (with labor) in cash. So, I told him I would seek a second opinion.
I called STI Heating & Cooling who were booked for the week so I made an appointment for the following week. Ted arrived on time and was very professional. He took a look at my unit (which is 42 years old) and told me I needed a Hard Start Capacitor for $173. He also checked the amount of Freon (R22) told me I might need a little. He installed the capacitor and added a little Freon and my unit start blowing extremely cold air.
Ted’s work was great! He told me his father had an old unit like mines and he keeps him father's unit working. I told Ted the other repairman thought I needed a new compressor and Ted suggested maybe the other repairman was not familiar with older units like mine.
I am SO glad I called STI Heating & Cooling! I told Ted they are now my go-to company for ALL my HVAC activities. I would highly recommend this company - they proved to be a huge money saver for me.
SS
Scott Smith
Jul 25, 2024
5.0
I called STI to get my maintenance program started and to diagnose and repair if necessary a moaning noise coming from my furnace area.
Ted and Garrett showed up and were so courteous and professional. They did a phenomenal job on the cleaning of my air conditioner but even better they diagnosed what the moaning sound is and where it was coming from. A zone motor was going bad. That part has been ordered and it should be installed next week.
Thank you STI and a big thanks to Ted and Garrett for their professionalism and kindness.
JR
Julius C Ringus
Jul 24, 2024
5.0
Excellent prompt service for my two geothermal systems. Highly recommended.
TM
Tee M
May 8, 2023
5.0
Called after 5pm on a Sunday and still received a return call with the ability to schedule for the next morning. Jeff was great. In by 9am, found the problem, explained everything and happened to have the replacement part on the truck. Done before 10 am. Very reasonable priced. Much better experience than a few years ago with a local competitor. Stay away from CLIFF’S
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Certified April 26, 2026Yext Knowledge Graph
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