Components of HVAC systems sometimes produce unnecessary sounds and vibrations that are transferred into building structures and occupied spaces. Chillers are one component that depending on its severity, this noise can injure, tire, and bother building occupants. In addition, excessive vibration may also promote early mechanical failure and poor performance of HVAC equipment. To determine the cause and level of components, a certified TAB firm is often contracted to take measurements of sound pressure and vibration levels. SITA has the necessary instruments and understanding of the fundamentals of sound and vibration origin, measurements and problem solving.