We do it right!

We deliver the highest quality mechanical contracting services with expertise, safety, professionalism, and urgency.

ACI is a full-service facility support contractor that provides a wide variety of mechanical services to industrial, commercial, and institutional customers in Maryland, Washington DC, and Virginia.

Experts in our field, American Combustion Industries brings a deep understanding of combustion science and technology to exceed our clients’ expectations and build long-term relationships based on trust and collaboration. Our reputation for reliable customer service, quality service, and installation is reflected in our long track record of providing high-quality products and services and our willingness to go the extra mile for our customers.

We are constantly evolving and looking for ways to improve by staying up-to-date on the latest trends and technology. Our industry isn’t standing still — and neither is ACI.

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Proud to be part of Exigent

In 2022 ACI joined Exigent, a dynamic group of companies focused on providing critical commercial HVAC and mechanical services. This partnership allows ACI to better serve its customers with improved capabilities and resources. As part of Exigent, we are building the best group in mechanical services.

Our Team of Experts

ACI holds ASME and National Board of Boiler and Pressure Vessel Certifications, including R, A, H, and PP Authorizations.


Do you need a reliable service partner?

ACI has grown into a premier mechanical services company by hiring only the best highly-skilled and trained technicians. Our experienced and factory-trained team members are not just experts in boilers, chillers, central plants, and other mechanical systems. They are also experts in responsive and professional customer service. Our commitment to finding the most efficient and effective solutions to any challenge is reflected every day, with every customer. ACI has the knowledge, experience, and dedication to diagnose and repair or replace your mechanical system—and keep your facility operating.

Core Values

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Customer First

We’re committed to peerless customer service to resolve our customers’ issues quickly and safely while offering innovative preventative solutions.

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The safety of our customers, employees, and partners is our highest priority.

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Quality, no shortcuts

We do it right. We promise quality work and excellent service every time.

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Our respect for our customers is reflected in our prompt, reliable service. We guarantee our work—every job, every time.

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Our team of highly skilled technicians works together to solve our customers’ unique challenges.

“The winter of 2017 proved to be an extremely challenging time for our campus. When we needed them most, ACI delivered. They were willing to work through the night to ensure that our systems were up and running, and we were immensely impressed with the service we received.”

— Howard University

24/7 Emergency Service

Call ACI Now!

Need emergency commercial boiler, HVAC, chiller, or plumbing repairs? Call us for emergency services ASAP!

ACI services your most mission-critical systems 24 hours a day, 7 days a week. Count on us to be there when you need us.