ACSI Mechanical Group

ACSI Mechanical Group American Combustion Service Inc., or ASCI, in Mokena, IL, specializes in industrial / medical boiler / burner, furnace, and HVAC service and installation

ACSI Mechanical Group 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 current 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.

ACSI Mechanical Group is proud to work with some amazing sales partners. Check them out here:
08/12/2026

ACSI Mechanical Group is proud to work with some amazing sales partners. Check them out here:

At ACSI Mechanical Group, our experience, large parts inventory, and 24-hour emergency piping and mechanical repair serv...
08/06/2026

At ACSI Mechanical Group, our experience, large parts inventory, and 24-hour emergency piping and mechanical repair service make it easy to mobilize and help you resolve unexpected downtime or leaks. https://bit.ly/38JlqhW

Over the years, ACSI Mechanical Group has consulted and assisted many contractors in Chicago and the Chicago metropolita...
07/29/2026

Over the years, ACSI Mechanical Group has consulted and assisted many contractors in Chicago and the Chicago metropolitan area with burner start-up work, unusual boiler room problem-solving situations, basic back-up service support, and more.

ACSI Mechanical Group was founded by Frank M. Lacny in December 1984. The company has always been based in the beautiful southwest suburb of Mokena, Illinois.

ACSI Mechanical Group is among a select group of firms that offer combustion-related refractory products and services na...
07/22/2026

ACSI Mechanical Group is among a select group of firms that offer combustion-related refractory products and services nationwide. Give us a call or visit our website to start working with us today. https://bit.ly/38JlqhW

Chicago-area facilities trust us when the problem is too complex for a generalist.Talk to a specialist: https://bit.ly/3...
07/21/2026

Chicago-area facilities trust us when the problem is too complex for a generalist.

Talk to a specialist: https://bit.ly/3ORH6xe

Every heating season leaves behind wear that doesn't announce itself. Soot. Scale. Burner drift. Piping stress.Now is th...
07/15/2026

Every heating season leaves behind wear that doesn't announce itself. Soot. Scale. Burner drift. Piping stress.

Now is the time to find it before the cooling season starts. ACSI Mechanical Group has been assessing commercial and industrial systems for over 40 years.

Schedule an inspection today.

Complex combustion problem? ACSI Mechanical Group has been Chicago's burner specialist since 1984.Contact us before the ...
07/09/2026

Complex combustion problem? ACSI Mechanical Group has been Chicago's burner specialist since 1984.

Contact us before the problem gets bigger: https://bit.ly/3ORH6xe

Whether you're in need of power piping, process piping, system demo, or install, ACSI Mechanical Group's pipefitters are...
07/08/2026

Whether you're in need of power piping, process piping, system demo, or install, ACSI Mechanical Group's pipefitters are here for you. Contact us today to get started on your next piping project.

Have a fun and safe Independence Day!
07/04/2026

Have a fun and safe Independence Day!

At ACSI Mechanical Group, our mechanical department is well equipped to handle all your piping and mechanical installati...
07/01/2026

At ACSI Mechanical Group, our mechanical department is well equipped to handle all your piping and mechanical installation needs. We provide 24-hour emergency piping and repairs so that you can rest easy knowing that your mechanical needs are taken care of. Visit our website or give us a call today to learn how ACSI Mechanical Group can help you. https://bit.ly/2WlAxbJ

Address

19325 S Schoolhouse Road
Mokena, IL
60448

Telephone

+17737379200

Website

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