Oak Brook Mechanical Services, Inc. was founded in 1975 as an HVAC service contractor. Over the years we have grown into one of Chicagoland's best service providers. While we have grown into a larger company, we have never lost our focus on service. Our department has grown to over twenty field personnel and we are available 24 hours a day, 365 days a year! We provide: Heating and cooling unit installations Service and maintenance Natural compressed gas installation Piping Engineering and planning Temperature and humidity controls System renovations and energy management We service both commercial and industrial sectors and service all major brands. We offer complete coverage on all our mechanical equipment, as well as preventative maintenance plans. Please call one of our experienced staff members for all your HVAC needs!