Personalized Service, Engineered Installations, Intelligent Control.

We service complex commercial HVAC systems 24/7, design and build installations of cutting-edge efficient equipment, and provide intelligent control of new and existing installations.

Who We Are

Kirwan Mechanical Service was started by William (Bill) Kirwan in 1981. His focus was on rebuilding stationary refrigeration compressors and re-tubing chillers. Bill’s initial accounts included Campbell’s Soup and Hawthorne Race Course, but Kirwan Mechanical Service quickly grew and the scope of services expanded to boiler plants and commercial HVAC equipment.

In 2021, Bill decided it was time to hang up his work boots, and sold the business to a long time employee, Brian Newell, and his wife Ashley. Brian has been with the company since 2005 and knows the company and industry from every angle, starting as a service technician, moving his way into the office and eventually into a leadership position. Brian and Kirwan Mechanical Service now offer the greater Chicagoland area unmatched commercial HVAC solutions, industrial mechanical services and personalized customer service.

We prevent unexpected disasters to give you peace of mind.

Kirwan Mechanical Service is not an enormous servicer, and that’s by design. By focusing on quality over quantity, we are able to hone in on your individual needs, personalize your service and assist with long term planning. We have been in the business since 1981, building trust and an expectation of excellence with all of our clients. Experienced with large buildings, Kirwan delivers top-notch service and problem solving to provide you with a complete solution across multiple tradecrafts. Resonate with you? Fill out the contact form and we will be in touch soon.