Cooling coil, along with the design decisions made to select them, can significantly impact the capital and life-cycle costs for thermal comfort. Regardless of the liquid medium used, the liquid is delivered to the cooling coil at a cold temperature. In the case of direct expansion equipment, the air passing over the indoor cooling coil heats the cold liquid refrigerant.

As this liquid passes through the indoor cooling coil on the inside of the heat exchanger, two things happen to the air that passes over the coilís surface on the outside of the heat exchanger. Air flow over the indoor cooling coil also affects the coilís capacity and is directly proportional to the total capacity of an AC system.

Two heat exchanger are placed in the air stream, one upstream of the cooling coil and the other downstream of the cooling coil. If we assume that a standard mixing box stratifies, or creates freezing air at the cooling coil at an outside air temperature of 26?F, the enhanced mixing box alternative could work with outside air in the 12? to 23? range. If enough heat is transferred, the outside air will be above freezing and the cooling coil is therefore protected.

Condensate removal by the cooling coil is greatly enhanced, often doubled by the heat pipes. The cooling coil is fabricated according to the customer's specifications with appropriate headers and fittings. The mixed air flows through the filters, through the cooling coil and into the heating coil.

The mixed air goes through the filters and into the cooling coil. The mixed air flows through the cooling coil where it gives up its heat into the chilled water tubes in the coil. Calculates central cooling coil loads for the months being considered in order to identify the maximum cooling coil load.