Business Details
42 Years
experience
Emergency
services
Trusted HVAC, Boiler & Piping Services in Mokena, IL
ACSI Mechanical Group was founded in December 1984 by Frank M. Lacny and has operated from Mokena, Illinois since its inception. Our company specializes in industrial HVAC, boiler, and piping systems, offering comprehensive installation, maintenance, and 24/7 emergency repair services. With decades of hands-on experience, we serve diverse industries including healthcare, manufacturing, and energy, providing specialized combustion and mechanical solutions. Our team holds Boiler and Pressure Vessel Certification Program credentials, including R Stamp (REPAIR) certifications, ensuring compliance with national safety standards. We maintain an extensive inventory of new and used equipment, enabling rapid response to client needs while minimizing downtime.Our consultative approach addresses energy efficiency, emissions, and cost-saving opportunities, supported by partnerships with leading equipment manufacturers. We have earned recognition as burner specialists, serving clients nationwide from Wisconsin to Mexico. Our commitment to worker safety was acknowledged with the 2017 Safe Workplace Award by the Mechanical Contractors Association of Chicago. We provide customized solutions for high-temperature furnaces, kilns, and critical mechanical systems, backed by 24-hour emergency support. Our expertise extends to refractory services, steam trap surveys, and tank repairs, positioning us as a one-stop shop for industrial mechanical needs.
Services
Boiler Repairs
HVAC Maintenance
Piping Installation
Refractory Services
Emergency Repairs
Burner Analysis
Tank Repairs
Equipment Sales
Steam Trap Surveys
Combustion Consulting
Details
- Year established: 1984
Highlights and features
- We offer 30+ years of specialized experience in industrial HVAC and boiler systems.
- Our team holds Boiler and Pressure Vessel Certification Program credentials.
- We provide guaranteed 24/7 emergency response for critical system failures.
- Our consultative approach identifies energy savings averaging 6% annually.
- We maintain an extensive inventory of new and used equipment for rapid deployment.
Associations and certifications
- Mechanical Contractors Association of Chicago (MCA)
What people say
Great service
Prompt response
Energy savings
Knowledgeable staff
24/7 availability
Services
Boiler Repairs
Our certified technicians provide comprehensive boiler repairs, including retubing, patch welding, and refractory work. We diagnose efficiency issues caused by sediment buildup and perform high-efficiency burner upgrades. Emergency services restore operations within hours, while preventive maintenance extends equipment lifespan and preserves warranties.
HVAC Services
We service industrial and commercial HVAC systems, including chillers, air conditioners, and heating units. Our team performs energy audits to identify 6% average annual savings opportunities. Emergency repairs address system failures 24/7, while preventive maintenance ensures optimal performance in high-rise and manufacturing environments.
Piping Installation
Our union-certified pipefitters install and repair gas, oil, and steam piping systems. We handle high-pressure applications and comply with OSHA safety standards. Services include process piping upgrades, equipment relocation, and leak repairs using black, galvanized, and stainless steel materials.
Refractory Services
We provide refractory installation and repair for industrial furnaces and boilers operating above 2100F. Our engineers assess thermal shock resistance and chemical exposure to select appropriate linings. Preventive inspections identify cracks or deterioration requiring replacement before system failures occur.
Emergency Repairs
Our 24/7 dispatch center responds to critical system failures within hours. Technicians carry specialized tools for boiler, HVAC, and piping emergencies. Rapid diagnosis and repair minimize downtime, with same-day service available for high-priority clients across multiple states and international locations.
Questions
Do you offer 24/7 emergency HVAC and boiler services?
Yes, our 24/7 dispatch center responds to HVAC, boiler, and piping emergencies nationwide with rapid technician deployment.
What industries do you serve?
We work with healthcare facilities, manufacturers, high-rises, refineries, and industrial clients requiring specialized mechanical systems.
Can you perform boiler efficiency assessments?
Our complimentary burner analysis identifies energy savings averaging 6% annually through combustion system optimization.
Do you sell new and used equipment?
Yes, we maintain an extensive inventory of boilers, burners, HVAC units, and replacement parts for immediate deployment.
Are your technicians certified?
Our team holds Boiler and Pressure Vessel Certification Program credentials, including R Stamp (REPAIR) certifications.
Do you provide nationwide service?
We service clients from Wisconsin to Mexico, with emergency response capabilities extending to Alaska and New Jersey.
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