By Mark E. Schaffer

ISBN-10: 1461917573

ISBN-13: 9781461917571

A consultant that offers principles for controlling the noise and vibration of HVAC structures.

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Additional reproduction, distribution, or transmission in either print or digital form is not permitted without ASHRAE's prior written permission. A Practical Guide to Noise and Vibration Control for HVAC Systems Rendering courtesy of the Greenheck Fan Corporation. Figure 2-5 Cutaway view into a mixed flow fan. Figure 2-6 Inline fan sound power level comparison. 31 © 2011 American Society of Heating, Refrigerating and Air-Conditioning Engineers, Inc. org). For personal use only. Additional reproduction, distribution, or transmission in either print or digital form is not permitted without ASHRAE's prior written permission.

For personal use only. Additional reproduction, distribution, or transmission in either print or digital form is not permitted without ASHRAE's prior written permission. A Practical Guide to Noise and Vibration Control for HVAC Systems Figure 2-17 Vibration isolation suspension for propeller fans. Figure 2-18 Noisy and quiet installations of ceiling-mounted exhaust fans. 39 © 2011 American Society of Heating, Refrigerating and Air-Conditioning Engineers, Inc. org). For personal use only. Additional reproduction, distribution, or transmission in either print or digital form is not permitted without ASHRAE's prior written permission.

Additional reproduction, distribution, or transmission in either print or digital form is not permitted without ASHRAE's prior written permission. General Design Guidelines Figure 1-19 Plan view of return air shaft with supply duct takeoffs obstructing return airflow. Construction Figure 1-20 generically compares the sound isolation performance of several shaft, chase, and enclosure constructions. In general, higher wall mass and larger clearances around ducts provide better sound isolation. The higher stiffness of a masonry shaft provides excellent low-frequency sound isolation.

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A Practical Guide to Noise and Vibration Control for HVAC Systems by Mark E. Schaffer


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