Bypass dampers are an important addition to most commercial heating and cooling systems. They are used to regulate the airflow in a ventilation system, allowing for better control of temperature and air flow, greater energy efficiency and improved indoor air quality. In short, bypass dampers are essential if you want to keep your business environment comfortable and efficient. But what exactly is a Bypass Damper? Put simply, it’s a plate or valve located near the main supply and return plenums of a system that allows some of the warm or cool air to “bypass” the primary heat exchanger or cooling coil. This diverted air serves as a buffer against large fluctuations in air temperature. A Bypass Damper helps maintain comfort levels while reducing operation costs as well.