2020 is our 36th. year in business. We are proud of how far we’ve come, but we know we wouldn’t be here without you. We are thankful for your continued trust, and remain committed to giving you the very best, in all that we do.

  1. We are there when you need us: Our 24-hour team of highly qualified and experienced personnel,
    is there to help when you need it most – day or night!
  2. We maintain our expertise: Our technicians are the best in the business, and we want them to
    stay that way. Continuous training both In-house and through a wide range of training seminars,
    ensures unparalleled skill, expert service, and the best value for your money.
  3. We make YOU our top priority: From our dispatch center and office personnel, to our service
    technicians, mechanical pipe-fitters, and refractory bricklayers and laborers, our friendly and
    courteous staff members, are dedicated to the highest level of customer service. We work as a
    team to meet your needs every step of the way.
  4. We do what it takes to get it right: If our technician finds a problem during service, we follow up to
    make sure it’s resolved. If we don’t have the part you need, we find a temporary solution to keep
    things running, until we do. If we’ve completed a job, we call to confirm that everything is working
    as it should. When it comes to our customers, we’re willing to go the extra mile.

You are the best part of our business. Our goal is to make sure you know it!

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.


  • Take a Quick Look (Before You Shut Down Your Boiler)

    Your boiler and heating system has had a long winter. Before you shut down your boiler for the season, give it some attention....

  • A Letter from Our Owner

    Thank you for your business and the opportunity to serve you. We wanted to personally share an update on our efforts to help keep your operations up and running during the Coronavirus (COVID-19)....

  • Checking for Refractory Problems

    Boilers can last for many years without replacement. To get the most from your boiler, be sure to perform our “Top 3 routine checks.”...