The way we control the speed of fan motors or pump motors has tremendously changed in the past two decades with the introduction of variable-frequency drives (VFDs), aka variable-frequency controllers ...

Five high-performance heating and cooling solutions for consumers, including a new air conditioner, a heat pump, two gas furnaces, and a fan coil, have been added to the company’s product line. The ...

Fans are often used to ventilate agricultural buildings. Adjoining rooms with connecting air paths through open doors or manure channels can operate as a single room with a common negative pressure.