CONSTRUCTION No of rows:2-10 Copper tubes with Aluminum fins. Fins spacing brtween 4-12 fpi. Thickness of fins 0.1-0.4 mm Diameters of tubes in the coils - 1/2" ,5/8" & 3/8" OD. Thickness of tubes 0.4-0.65 mm. Header-Copper/ Galvanized Steel /SS Casing frame work- SS/GI. APPLICATION FOR CHILLED WATER COIL in case of using a water cooler installation. (chiller) APPLICATION FOR HOT WATER COIL Used in the event of access to water heating installation (Local boiler OR heating system) heating the supply air to the room.