Duct Unlimited was a manufacturing company responsible for producing various starship support systems including life support systems, heat exchangers, radiation negators, and heating and cooling systems. Subsidiaries of Duct Unlimited produced similar systems for the residential and industrial markets, including hostile-environment colonies. Duct was one of the original contributing sponsors to the Corporate Sector Authority at the time of the Corporate Sector Charter, but the company was upgraded to voting sponsor.[1]


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