Madok fluid coils are designed for air cooling or heating applications using chilled water, hot water or brine (e.g., ethylene or propylene glycol mixtures). Counter-flow fluid circuits are designed specifically for the intended application to optimize heat transfer while minimizing fluid pressure drop. Connections are sized to match designed flow rates or existing field locations. Madok coils are all custom circuited to allow for complete drainage with removal of the drain plug. Connection orientations can be tailored to match installation requirements. Vent and Drain connections are supplied on all fluid coils, unless specified otherwise. The standard connection is a ¼” FPT copper bushing located on the face of the headers. We recognize this may not be the optimum location for all coils, so we offer a variety of connections and locations based on overall coil geometry and customer needs. Vent and drain connections can be placed in the top and bottom of the headers, inside or outside the headers, or even in the connections. These optional connection locations facilitate proper venting and draining and, therefore, reduce the installation and maintenance cost over the life of the coil.