Customer solutions delivered

Clients come to ACSI for solutions for their piping, all types of boilers, equipment installations, emergency pipe repairs and combustion systems needs. Our experience and large parts inventory make it easy to mobilize and help you resolve unexpected downtime or leaks. We supply in-house maintenance staff trained to keep your systems running smoothly and, we provide 24-hour emergency piping and mechanical repairs.

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Our Approach Sets Us Apart

Customers that come to us stay with us - find out why

What would you do with 6% savings in fuel costs?


See Our Latest Success

ACSI Mechanical Group recently installed a new boiler, a high-efficiency burner, an economizer and related energy saving equipment to help a local hospital save energy costs. A boiler is only as efficient as the burner it is mated to, and ACSI Mechanical Group installed one of the most efficient burners available. At most, the old burner was 76 to 78 percent efficient. The new burner will offer increased commodity saving of 80 to 85 percent! To capture further savings, the client also elected to install an economizer too. Since the facility couldn't shut down for work to be completed, the utilities remained operational while the older unit was safely disconnected and removed.

// What Our Clients Say




Keep Cool All Summer with ACSI Mechanical Group

Summer is in full swing, and your air conditioning unit is hard at work. Make sure it keeps doing its job, by giving it the attention it needs. An inspection and tune-up will help ensure that the major components of your air conditioning unit are running as they should, which will keep you comfortable while … Continue reading “Keep Cool All Summer with ACSI Mechanical Group”

Repair or Replace? Which is Best for Your Boiler?

The average life of a boiler is 30 to 40 years, occasionally even longer. Sometimes it is best to replace an aging boiler, but if the boiler is in pretty good shape, it may make sense to repair it. Here are some things to consider as you decide: Size and Type of Your Boiler: Watertube … Continue reading “Repair or Replace? Which is Best for Your Boiler?”

ACSI Mechanical Group Now Provides ASME Authorized Boiler & Pressure Vessel Repairs

At ACSI Mechanical Group, we pride ourselves in providing specialized maintenance and installation services to help you reduce risks, lower costs, and maintain your facilities. In addition to Service, Mechanical, Refractory, and Piping Services, we now offer a full suite of boiler services, with the addition of American Boiler & Tank Repair.  During Boiler Normal … Continue reading “ACSI Mechanical Group Now Provides ASME Authorized Boiler & Pressure Vessel Repairs”

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19325 S. Schoolhouse Road, Mokena, Illinois 60448 (773) 737 - 9200

24 Hours Emergency Services :
(773) 737 - 9200