Chilled Beam Our one and two row chilled beam coils are manufactured with fin spacing as large as 5 fins per inch for passive beams and 8 to 10 fins per inch for active beams in both 2 pipe and 4 pipe configurations Casing Galvanized Steel Stainless Steel Aluminum Copper Headers Copper Fittings MPT/FPT Water Bead Special Fins Aluminum Copper Sine Wave Flat Tubes Copper .016" Wall .025" Wall .035" Wall