Since 1882, R. Williamson & Associates has been providing industry with clean, comfortable air. The kind of air that every employee deserves. Using innovative, efficient & effective ventilation solutions we serve the commercial & industrial marketplaces in greater Chicago, Southern Wisconsin and Northwest Indiana. area . We provide an interactive experience, having engineers and technical sales representatives on staff with more than 135 years of air systems design experience. Five generations has earned a reputation as a supplier of quality-engineered products, prompt service and support to our clients. Our continual growth is a compliment to our professional sales people and clients who expect the best. We are proud of the fact that the manufacturers we represent are leaders in their field, ready to support our efforts and offer knowledgeable engineering staffs, quality products From concept to consummation, we can provide the design, equipment and installation services necessary to condition your space. Below is a brief overview of some of the services we provide: General & Process Ventilation Fans & Blowers Air Cleaning & Dust Collection Systems Air Curtain & Air Door Systems Mist, Fume & Smoke Collection Systems Make-up & Intake Air Systems Recirculated Air Systems Heating & Cooling Systems Ductwork Filtration