DRS Marlo Coil 's 210,000 sq. ft. administrative and manufacturing facility is located 30 miles southwest of St. Louis, Missouri. DRS Marlo Coil has been a leading manufacturer of custom engineered coils, refrigeration and air handling systems since 1925. Our engineering and design expertise are utilized in applications for aerospace, food processing, healthcare, semi-conductors, pharmaceutical industries and Navy & Marine applications. We also supply coil and air handling equipment to a number of OEM's. Our primary sales territories are in the United States, Puerto Rico and Canada