Industrial and Commercial Boiler, Burner & HVAC Repair Services

Your equipment doesn’t always consider your convenience. Fortunately, ACSI is committed to keeping you in business whenever you need us, even in the middle of the night. When problems arise, we will get your equipment running – no matter what it takes.If you find yourself facing equipment trouble this winter, give us a call. We maintain a wide array of controls and components in stock, including pipe fittings up to 6” and limited pipe and fittings up to 12”. If we don’t have the exact part you need on hand, we will keep your building from freezing by retrofitting a similar part for temporary service until we can make permanent repairs.

We are here for you 24/7. Call 773-737-9200 and we will get you up and running.
Happy Thanksgiving ACSI
We are grateful for your business, particularly at this time of year. All of us at ACSI wish you and yours a happy and blessed Thanksgiving.

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.