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.

Not every boiler room problem has a simple fix. That's why we've spent over 40 years specializing in the ones that don't...
06/11/2026

Not every boiler room problem has a simple fix. That's why we've spent over 40 years specializing in the ones that don't.

See how we can help: https://bit.ly/3ORH6xe

Mid-summer is the wrong time to find a mechanical problem. Now is the right time to look for one. https://bit.ly/48WbGgI
06/02/2026

Mid-summer is the wrong time to find a mechanical problem.

Now is the right time to look for one. https://bit.ly/48WbGgI

Honoring those who served and sacrificed for our country.
05/25/2026

Honoring those who served and sacrificed for our country.

Get your facility ready for the season ahead with a comprehensive check-up from ACSI Mechanical Group.We specialize in k...
05/20/2026

Get your facility ready for the season ahead with a comprehensive check-up from ACSI Mechanical Group.

We specialize in keeping your systems running at peak performance so you can focus on your business.

Don't wait for a breakdown. https://bit.ly/4sMSEB9

Ensure the longevity of your boiler with ACSI Mechanical Group's boiler maintenance services. Our experienced team condu...
05/14/2026

Ensure the longevity of your boiler with ACSI Mechanical Group's boiler maintenance services. Our experienced team conducts thorough inspections and performs necessary adjustments to help prevent costly breakdowns and keep your operations running smoothly. https://bit.ly/4dhgKLP

Here's to the mothers who balance it all. Happy Mother's Day!
05/10/2026

Here's to the mothers who balance it all. Happy Mother's Day!

Boilers. Burners. Piping. Refractory. We handle it all for commercial and industrial facilities across the Chicago area....
05/06/2026

Boilers. Burners. Piping. Refractory. We handle it all for commercial and industrial facilities across the Chicago area.

Ask a question to get started: https://bit.ly/3ORH6xe

Before you close out the heating season, it's worth a look at what sustained peak-demand operation leaves behind:—Soot b...
04/30/2026

Before you close out the heating season, it's worth a look at what sustained peak-demand operation leaves behind:

—Soot buildup on fireside surfaces
—Scale on waterside heat exchanger surfaces
—Burner combustion drift
—Corrosion and stress in steam, gas, and oil piping

These are the conditions that turn into emergency calls in six months. A spring assessment from ACSI Mechanical Group catches them now.

Thank you to the people who coordinate crews, manage schedules, and keep projects on track.
04/22/2026

Thank you to the people who coordinate crews, manage schedules, and keep projects on track.

Address

19325 S Schoolhouse Road
Mokena, IL
60448

Telephone

+17737379200

Website

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