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Good Hearing?
A typical person with good hearing can hear from about 20Hz to 20kHz (the audio bandwidth). A person's voice will usually range from 500Hz to 2kHz...more

Sound Insulation
Two parameters describe sound insulation; Dw and Rw. Dw is the insulation between rooms. Rw is the lab-tested insulation of a wall/floor...more
Part L2A
Conservation of fuel and power in new buildings other than dwellings.

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Non Domestic EPCs can also be known as:
Building EPC, Commercial EPC Rating, CEPC, Commercial EPC, Non Domestic EPC, Office EPC, Industrial EPC, EPC Rating,
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