We have already talked about how Dynamic Air Cleaners, with their low static pressure, save money on energy consumption and possibly even fan selection. And how the long filter life, measured in years, saves money on maintenance. But did you know that Dynamic Air Cleaners can also save money on the acoustical side? Not to mention the role that acoustics play in worker productivity.
The NC Rating
Commercial tenants are increasingly looking beyond the surface when evaluating Class A space. Good acoustics are an integral part of that evaluation. The Noise Criteria (NC) rating, the numerical value of background noise generated by building equipment and occupant activities, should be below 40 and be consistent across the range of audible frequencies. Tenant leases are often times requiring the space to meet lower NC targets. The space should be free of low, rumbling and high, hissing noises which makes HVAC system design a key component where sound power level from fans are determined by motor power, capacity, static pressure and discharged volume.
Reducing Noise at the Source
Effective acoustic planning and design is important for many reasons. The cost of quieting an installed unit always exceeds the cost of a design that makes acoustics an integrated part of the space and system layout. Good noise control starts with effective design of the fan system, including its location, orientation to duct systems, and optional equipment. The low static pressure inherent in Dynamic Air Cleaners can translate to significant sound reduction which can eliminate the need for sound-dampening duct-lining treatments, baffles, silencers, duct sound attenuators, and/or electronic sound masking systems.
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