An "Outdoor Unit" refers to the external component of a heating, ventilation, and air conditioning (HVAC) system. It typically houses the compressor, condenser coil, and fan, which work together to transfer heat between the inside and outside of a building. This unit is essential for cooling indoor spaces during hot weather and can also be part of a heat pump system for heating in colder months. The outdoor unit is usually installed on a concrete pad or mounted on brackets outside a home or building. Proper placement and maintenance are crucial for optimal performance and energy efficiency. Regular cleaning and inspections help ensure that the unit operates effectively throughout its lifespan.