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Mechanical / HVACaka: cooling coilaka: heating coilaka: DX coil

Coil

In Plain English

A finned tube bundle inside an air handler that heats or cools air as it passes over the surface.

Definition

A heat transfer element in an air handling unit or terminal device consisting of rows of tubes carrying hot water, chilled water, steam, or refrigerant, surrounded by aluminum fins that increase the heat transfer surface area. Heating coils warm supply air; cooling coils cool and dehumidify it. Coil performance is characterized by entering and leaving air conditions and water flow rate.

Example

The 8-row chilled water cooling coil in the air handler cools supply air from 80°F to 55°F at peak summer conditions.

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