Variable frequency drives (VFDs), also known as variable speed drives (VSDs), are used to modulate the speed of motors in various applications, from hydronic water pumping to VAV fan units to vacuum ...

To compare the failure rates between Jet continuous positive airway pressure device (J-CPAP-variable flow) and Bubble continuous positive airway device (B-CPAP) in preterm infants with respiratory ...

There’s a debate among commercial and industrial hydronic system designers: how best to refine and enhance pumping and system efficiency to precisely match output to load (need). Decades ago, ...

Variable refrigerant flow (VRF) systems represent a dynamic advancement in heating, ventilation and air conditioning, providing tailored temperature control through precise modulation of refrigerant ...