Steam coil is normally use in air heating application. It is design for transferring high temperature to the air passing through it. The steam temperature normally supplies from boiler to steam coil is more than 100°C. It is important to ensure a steam coil installed in a smooth loop system where leaving steam or condensate steam drain out from the system fast. Else pressure will build up in the steam coil and hence to cause leakage of the steam coil. That is why a steam coil does not apply in a close-loop system. Condensate steam that leave steam coil must be drained out smooth and fast.