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

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Specific Fan Power<br />

There are now str<strong>in</strong>gent requirements to ensure that power<br />

c<strong>on</strong>sumpti<strong>on</strong> <strong>in</strong> a build<strong>in</strong>g is as efficient as possible so as<br />

to m<strong>in</strong>imise <strong>energy</strong> costs. Specific Fan Power (SFP) has<br />

been <strong>in</strong>troduced as a measurement of a ventilati<strong>on</strong><br />

system’s <strong>energy</strong> <strong>efficiency</strong>.<br />

The Specific Fan Power for an entire build<strong>in</strong>g can be<br />

def<strong>in</strong>ed as the total <strong>energy</strong> <strong>efficiency</strong> of all the fans <strong>in</strong> the<br />

ventilati<strong>on</strong> system divided by the total air flow through the<br />

build<strong>in</strong>g. The lower the value, the more efficient the<br />

system is at transferr<strong>in</strong>g the air.<br />

E.g <strong>in</strong> Norway the recommendati<strong>on</strong>s for public sector<br />

purchas<strong>in</strong>g are that the maximum SFP should be 2.0 when<br />

ma<strong>in</strong>ta<strong>in</strong><strong>in</strong>g and repair<strong>in</strong>g ventilat<strong>in</strong>g units, and 1.5 for new<br />

<strong>in</strong>stallati<strong>on</strong>s.<br />

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

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