Springfield’s Best Member Since: 1999 At Ozark York, quality comes first. Offering customers superior products and service means everything has to be done right the first time, which requires team effort. From the office staff to the outside service crews, the Ozark York team works together to uphold their 50-year tradition of quality residential, commercial, and industrial heating and air conditioning products and services. Owner Dennis Marbut has the background and skill to build customers’ confidence. Dennis received a Mechanical Engineering degree from the University of Missouri in Rolla. Because he lives and works in Springfield, he has a great understanding of the needs and wants of local customers. This understanding, along with teamwork and experience, helps Ozark York deliver the quality products and services their customers expect.