A run-around coil is a component commonly found in HVAC (heating, ventilation, and air conditioning) systems, particularly in systems using heat recovery techniques. It consists of two coils (one for heating and one for cooling) that are interconnected with a fluid or refrigerant circulating between them, enabling energy efficiency and improved thermal performance. ### How It Works 1. **Heat Exchange**: The run-around coil transfers heat from one fluid stream to another.
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