By the time HVAC noise complaints cross Tim Kuski's desk, they are pretty bad. As general manager of Centrifugal and Vane Axial Products for Greenheck, Schofield, Wis., Kuski has heard his fair share of noise complaints - and he would appreciate the pun.
"Sound and vibration control is becoming more important in HVAC," he said. "Sound and vibration are very closely related. The relationship between the two has to do with the frequency at which a vibration or pulsation occurs." The lowest he deals with are centered around 63 Hz (cycles per second) and go up to 8,000 Hz. The lower frequencies, he said, have been more difficult to deal with than those at the upper end.