Auer Steel is an independent HVAC ( Heating, ventilation and air conditioning products supplier) To HVAC contractors in Wisconsin, Minnesota, The UP of Michigan and parts of North Dakota.Auer Steel & Heating Supply Co. is a full-service distributor of high quality indoor comfort products. With eight locations across the upper Midwest, Auer Steel features Bryant, Carrier and Payne furnaces, air conditioners, and accessories as well as many industry leading brands of HVAC equipment and accessories.