Cooling systems play an increasingly critical role in protecting sensitive IT systems from extreme variations in temperature and humidity that can cause system failure, degrade performance, and shorten equipment life—particularly in the high-density environments that have become common in enterprise data centers Precision cooling systems are designed specifically to meet the needs of dense electronic loads, which generate a dryer heat than typical comfort-cooling environments and require year-round, 24-hour cooling. Electronics are also more sensitive to variations in humidity and air quality than typical comfort-cooling environments.