Single stage fabricated centrifugal blowers and regenerative pressure blowers give reliable air or gas motion at a universal range of specific pressures and volumes. They provide stable performance from a low rated flow free from surge or pulsations. Each machine is capable of delivering a maximum resonance limit of 1.5 mils at the bearing housing. They consume power based on the volume output and a system volume modification can be done through the throttling of an alternative inlet or outlet damper. These blowers are generally used for in-plant industrial, commercial and municipal application in various original equipment manufacturer materials for compost and waste water aeration, temperature regulation, combustion air delivery and many others.