Profile: R&R Engineering Co. is specialized in engineering, design, and manufacture of air cooled exchangers. We build replacement sections, and can also do repairs, large or small, on all coolers. Our line of UI style induced draft air coolers for gas compression applications are designed for ease of maintenance. All UI air cooler bundles & louvers are mounted on the front of the air cooler, eliminating the lengthy & costly dis-assembling of the cooler box during bundle replacement.