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One of the things that tie nearly all residences, commercial buildings, and industrial facilities together is the presence of a heating, ventilation, and air conditioning (HVAC) system. The most prominent visible feature of the HVAC system, and the one most susceptible to direct physical damage, is the air conditioning condenser.

AC Condenser Units

The condenser is a component of the refrigeration cycle that is used to cool the air in a building. Hot high pressure refrigerant gas is pumped from a compressor to the outdoor condenser, where it loses the heat to the outside. The condenser removes the heat from the system by using a fan to pull air across a coil that the refrigerant runs through. In order to remove that heat with maximal efficiency, the condensing unit typically features a coil made of copper (high thermal conductivity) that is covered with many thin aluminum fins (high surface area). Condensers are installed in areas that are exposed to outside air, such as rooftops or ground pads.

How Are Condenser Units Damaged by Hail?

In order to function efficiently, AC condenser units must be exposed to outside air.  This also means that they are exposed to the hazards of the outdoors, including impact by hailstones. The National Weather Service (NWS) records indicate that from 2010 to 2013, the US experienced an average of nearly 7,000 hail reports per year1. This figure only accounts for hailstones measuring more than 1 inch in size, which can be considered the threshold for damaging hail.

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