American Combustion Service, Inc. & ACSI Mechanical was founded by Frank M. Lacny in December 1984. The Company has always been based in the southwest suburb of beautiful Mokena, Illinois. In 2009, the company moved to its new location at 19325 S. Schoolhouse Road, Mokena, Illinois. The spacious building is home to corporate offices, stock room and shop for any "in house" fabrication and repairs.

Located off Interstate 80 and Route 45 makes it convenient to travel to service clients up into  Wisconsin, Iowa, Indiana and southern Illinois. We have provided services for customers as far east as New Jersey and as far away as Mexico and Alaska.

The consulting and specialized service capabilities for working on any type of fuel burner and/or fuel, has earned American Combustion Service, Inc. a reputation as "burner specialists" - second to none in the area!

Over the years, the Company has consulted and assisted many other contractors in the Chicago and Chicago metropolitan area with burner start-up work, unusual boiler room problem-solving situations, or just some basic back-up service support.

Services and 24 Hour Emergency Care

Combustion and Piping Services are core to our operations. Take a moment to find out how we can help you.

Air Conditioning System
Alternative Fuels
Boilers
Burners - Gas and Oil
Calibration Services
Chillers
Crematories
High Temperature Furnaces
Incinerators
Instrumentation & Flow Recording Equipment
Kilns
New and Used Equipment
Ovens
Piping Installation & Repair
Refrigeration Systems

Refractory

Newsletters

ACSI communicates with its customers on a monthly basis. View some of our ideas, tips and techniques now.

ACSI and ACSI Mechanical Celebrated 25 Years in Business.

View our celebration with the Mayor of Mokena, Mokena Chamber of Commerce Ribbon Cutting Ceremony and of course the party. We appreciate our partners, customers, family, friends and the City of Mokena for your continued support.