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  1. A 24-hour team of qualified and experienced personnel to give you help when you need it most.
  2. Technicians that are continuously trained in-house and go through various training seminars to give you, our client, the best value for your money!
  3. Prompt, courteous service from a group of individuals who are dedicated to the needs of each one of our clients. Starting from our Dispatcher and Office Personnel, to our Service Technicians, and to our Piping and Refractory Crews.
  4. We will go the extra step to give our valued clients something extra in the way of quality service, to ensure long-lasting business relationships.
  5. By letting us service your needs, as YOU deserve to be serviced! You are getting the best when you call us.
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.



    August 2018


    It's not too late to prepare for the upcoming heating season, by upgrading your existing boiler with a new high-efficient burner. Not only will a high-efficient burner save energy and reduce your fuel costs, it will also qualify you for a Gas Company incentive rebate for your project, saving you even more money for its initial cost!!!...

  • Award

    June 2018

    American Combustion Service, Inc. Wins MCA Safety Award!

    American Combustion Service, Inc. (ACSI) has won The Mechanical Contractors Association of Chicago's (MCA) 2017 Safe Workplace Award in the category of 50,000 hours or less....

  • summer is almost here

    June 2018

    Summer is Almost Here!

    I remind all of our customers every year, around this time - that we service ALL types and makes of Air Conditioning Equipment. Now is the time for that "Spring-time" Check up!...