Coils are manufactured from tube materials consisting of copper, 90/10 cupronickel, SS, or carbon steel. Steam Coils have standard steam and steam distributing coils. Also available are industrial HVAC heating and cooling air-handling coils and plate fin, helical fin, L-footed, and solder-bonded air coils with 3/8–1 in. OD tubing for steam and water applications. Econo Line shell and tube heat exchangers, 4–30 in., are offered in steam-to-liquid or liquid-to-liquid styles.