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Training course on energy efficiency in SMEs - engine-sme.eu

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Fans<br />

Fans are used <strong>in</strong> ventilat<strong>in</strong>g units to transport the air from various air<br />

<strong>in</strong>takes through the duct system to the room which is to be ventilated.<br />

Every fan must overcome the resistance created by hav<strong>in</strong>g to force the air<br />

through ducts, bends and other ventilati<strong>on</strong> equipment.<br />

The resistance causes a fall <strong>in</strong> pressure, and the size of this fall is a<br />

decisive factor when choos<strong>in</strong>g the dimensi<strong>on</strong>s of each <strong>in</strong>dividual fan.<br />

Fans can be divided <strong>in</strong>to a number of ma<strong>in</strong> groups determ<strong>in</strong>ed by the<br />

impeller’s shape and its operat<strong>in</strong>g pr<strong>in</strong>ciple:<br />

• Radial fans<br />

• Axial fans<br />

www.eng<strong>in</strong>e-<strong>sme</strong>.<strong>eu</strong>

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