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The easy and sure way of selecting your fan!
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The easy and sure way of selecting your fan! Start the interaktive online software for selecting your individual fan system here … proSELECTA Are you already registered? Here you can register proSELECTA II... Read More

Velocity in Ventilation Ducts
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Velocity in Ventilation Ducts Recommended velocities in ventilation ducts The duct velocity in air condition and ventilation systems should not exceed certain limits to avoid unnecessary noise generation and pressure drop in the... Read More

NC – Noise Criterion
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NC – Noise Criterion For a given noise spectrum, the NC rating can be obtained by plotting its octave band levels on the set of NC curves Noise Criterion – NC – were... Read More