ACSI Group

With more than 30 years of experience in Industrial and commercial HVAC, Boiler and Burner Repair, ACSI has become the most trusted name in Illinois’s industrial and commercial market.

When your equipment has a problem, waiting is not an option, you need immediate repairs. ACSI has a team of dedicated professionals available to you 24 hours a day, 7 days a week. Our team of employees and skilled technicians understand the pressures you face when equipment such as burners, boilers, high-temperature furnaces, kilns or air conditioning units malfunction. We stock hundreds of parts to ensure we are ready to get your equipment up and running as quickly as possible.

ACSI has come to the rescue, repairing many oil burners, high-temperature furnaces, and kilns. Our talented technicians have the skills to retrofit and/or fabricate old obsolete parts when a replacement part cannot be found! We keep your oil burners, high-temperature furnaces, kilns and boilers working like new.

Since 1984, ACSI has repaired and maintained hundreds of burners, HVAC systems, and boilers. Hospitals, hotels, heavy manufacturers, and food processing plants among others, turn to our repair and maintenance technicians to keep their equipment running efficiently. We help our clients with everything from simple system repairs to complete replacements and rebuilds. We are Chicago’s Industrial and Commercial HVAC, Burner, and Boiler experts, but are also proud to work with our clients in Indiana, Wisconsin, and throughout the United States.

ACSI provides 24/7 emergency repair with same day response 365 days a year! We have a team of dedicated and experienced engineers available to serve you and solve your Commercial HVAC, Burner, Furnace Boiler repair needs. We offer long-term solutions for the repair of your system to ensure maximum efficiency throughout your facility. Get optimum output, energy performance, and low operational cost by getting regular repairs from the ACSI team. Contact ACSI today for more details on Industrial HVAC Repair!

Remember to keep the boiler log as a part of your routine monitor since having equipment performance data will help you to immediately spot any irregularities or issues. This will help you to know when it’s time for industrial boiler repair.

Industrial and commercial HVAC repair contracts can be customized to suit the customer requirements which includes full maintenance and repair services along with emergency call outs and boiler health checks.


  • ACSI Receives an Award from the Village of Mokena!

    American Combustion Service Inc. is thrilled to receive the 2019 Beautification Award from the Village of Mokena. We take pride in everything we do, we are grateful to be recognized for it!...

  • How do You Benefit by Using Our Services?

    By relying on our 24 hour team of qualified and experienced personnel, to give you help when you need it most....


    Kids are back in school, trees are starting to turn colors, and the cold weather is right around the corner. Now's the time to get your boilers/burners tuned up.  Most tune-ups save enough money to pay for themselves, if not more! ...