COMMISSION: Return and supply fans in a fully recirculating air handling unit can end up fighting each other, leading to alarms, inefficiency, and building comfort problems if airflow tracking is not ...

Air recirculation in ventilation systems is essentially the mixing of a certain amount of exhaust air into the supply air. This process provides a reduction in energy consumption when heating fresh ...

Europe’s safety regulator is advising commercial aircraft operators to adopt new procedures to switch off air-conditioning system recirculation fans regularly, as part of measures to limit the risk of ...