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BS 4856-4-1997 Methods for Testing and rating fan coil units, unit heaters and unit coolers Part 4. Determination of sound power levels of fan coil units, unit heaters and unit coolers using reverberation rooms
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BS 4856-4-1997 Methods for Testing and rating fan coil units, unit heaters and unit coolers Part 4. Determination of sound power levels of fan coil units, unit heaters and unit coolers using reverberation rooms
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