| Benz Companies represent manufacturers offering a complete line of Mechanical HVAC & Industrial Air Pollution Controls and Building Specialty Products. Benz Companies Welcome to Benz Companies Benz Air Engineering was founded in 1956 as Benz Company with the purchase of the manufacturers' representative business operated by Arthur E. Nelson. Founder Donald L. Benz, P.E., was employed by the Portland office of Trane Company from 1948 until 1956. Our office moved from downtown Portla.. |