Why is the face velocity of a cooling coil limited to 500 fe

Why is the face velocity of a cooling coil limited to 500 feet per minute?

Solution

Face velocity is limited to 500 feet per minute to eliminate moisture carryover. Air-side pressure drops are less than an inch of water across the cooling coil. Innovative research is sought to produce next generation compact and lightweight cooling coils with enhanced heat transfer surfaces operating at face velocities in excess of 1000 feet per minute