As of June 13, 2011, Marmion Industries Corp. went out of business. Marmion Industries Corp., doing business as Marmion Air Service, engages in the manufacture and modification of heating, ventilation, and air conditioning (HVAC) equipment for the petrochemical industry, primarily for hazardous location applications. It custom engineers special systems for industrial environments, as well as performs commercial HVAC construction services primarily in Houston, Texas. The company's customers include refinery and chemical plants service companies that build analyzer shelters, controls centers, and computer rooms in corrosive or hazardous locations. The company was based in Houston, Texas.