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prEN 17166

Fans - Procedures and methods to determine the energy efficiency for the electrical input power range of 125 W up to 500 kW

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prEN 17166
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This document provides procedures and methods for measuring and/or calculating the energy efficiency and associated characteristics of fans when driven by electric motors. This document deals with the following fan types;
-  axial fan;
-  centrifugal forward curved fan, centrifugal radial bladed fan;
-  centrifugal backward curved fan without housing, including centrifugal backward aerofoil fans;
-  centrifugal backward curved fan with housing, including centrifugal backward aerofoil fans;
-  mixed flow fan;
-  cross flow fan;
-  jet fan.
It provides procedures and methods to evaluate the compliance of the fan efficiency against minimum efficiency requirements.
This document includes stand-alone fans and fans that are integrated in other products. It gives guidance to manufacturers in providing information to surveillance authorities to describe the full extent of the fan by describing boundaries, significant elements and additional parts.
Some units previously identified as fans are now defined as Uni-Directional Ventilation Units. This document explains and shows by way of examples the difference between fans and Uni-Directional Ventilation Units.
This standard does not include:
-  Uni-Directional Ventilation Units;
-  fans that are designed specifically to operate in toxic, highly corrosive or flammable environments or in environments with abrasive substances, see Annex C.

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