It all started in 1975, when Oak Brook Mechanical Services, Inc. (OMS) was created as an HVAC service contractor. In the succeeding 45 years, we have grown into one of Chicagoland's largest and best installing and servicer companies. We service a wide variety of HVAC equipment and piping. We have successfully branched out into engineering and planning, renovation of existing systems and today's all-important energy management. "Green," sustainable energy sources such as natural compressed gas are particular areas of expertise.
OMS is a certified welding bureau contractor and a proud member of ASHRAE, The American Society of Heating, Refrigeration and Air-Conditioning Engineers. Our employees belong to the PipeFitters Union, Locals 597.
When you see one of our 23 service vehicles on the road 24/7, it's because a wide variety of customers have trusted OMS to provide the utmost in quality installation and service. They've come to know that our commitment is to satisfying their--and your--sales, service and installation needs.