Photo of What Can We do for You graphic from ACSI

For more than 30 years, American Combustion Service, Inc. has provided outstanding service to customers in Illinois and the Midwest Area. We take pride in the expertise of our technicians and our steadfast commitment to delivering the very best our industry has to offer. Even more, though, we appreciate the relationships we’ve built and the trust we’ve earned. Our customers’ best interests are-and always have been-our first priority.
You are important to us. We want to make sure we’re doing all we can to assist you.
ACSI might perform annual maintenance on your system, or perhaps we’ve solved a complicated piping problem in your building. We may have taken care of emergency repairs, installed new equipment, or helped maximize your system’s efficiency. How else can we help you?
We offer specialized service in many areas, including:

  • Fuel burners
  • Boilers
  • Ovens
  • Furnaces
  • Piping Work
  • Combustion Systems
  • A/C Systems
  • Burner Tune-ups
  • Replacement Parts
  • Instrumentation
  • Refractory Repairs
  • Maintenance Programs

Consider your facility’s needs and then consider how ACSI might meet them even more effectively. Give us a call at 773-467-7311. We’re here to help.


Frank Lacny, President
American Combustion Service, Inc.

Frank Lacny
Frank founded American Combustion Service, Inc. & ACSI Mechanical in 1984. His consulting and specialized service capabilities for working on any type of fuel burner and/or fuel has earned ACSI a reputation as “burner specialists” in the community. Frank has trained and consulted for many groups and companies in Chicago and the Chicago Metropolitan Area. His areas of expertise include burner start-up work, unusual boiler room problem-solving situations, and general backup service support.