Allison Transmission Heat Treat Plant CHALLENGE: Allison Transmission encountered significant challenges in air handling for one of its manufacturing facilities. The company wanted to replace the equipment serving a heat treat plant that produced hybrid transmissions for the U.S. military. However, the environment for the air handling units was caustic, causing galvanized steel units to degrade and lose performance. The high corrosiveness of the plant motivated Allison to pursue a more sustainable material for its air handling unit — aluminum. Yet another challenge in replacing the air handling unit in the heat treat plant was limited access. Part of the installation had to be factory fabricated, then transported on site through a small 4’x4’ opening in the roof. This prompted the compan

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