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While traditional ducted ventilation systems are relatively simple to design and install, they have some inherent disadvantages. A Ductless Jet Thrust System can provide much better and more effective airflow, can be made reversible to aid smoke control, and is less likely to reduce vehicle clearance height or car park capacity.
Fire safety in buildings is about protecting people, but also limiting economic losses and damage to the building. Preventing the spread of fire through material and fire dampers is key to this, and early detection of not just temperature rise, but smoke, is crucial to doing this effectively.
This article looks at factors to be considered when selecting the right fan to achieve the desired air flow volume. In particular, both fan and motor efficiency are explored.
This article explains the basic principle of air movement; how creating a pressure differential is the key to creating a flow of air; and how we can measure pressure – the first step in selecting the right fan to provide the desired air flow.
In Part 1 we looked at why sound is important, how we measure Sound Pressure and level, and how we measure Frequency, which describes the variation in sound pressure. In this second part we look at the remaining two important ways of measuring sound, Sound Sources and Sound Power.