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  3. New Energy Efficiency Classification for Air Handling Units (AHU)

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New Energy Efficiency Classification for Air Handling Units (AHU)


Dec 7, 2022
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This new classification is defined in the Rating Standard RS 6/C/005-2016, and covers, from the 1st of January 2016, all products in the scope of the Eurovent Certified Performance programme for Air Handling Units. The energy efficiency calculation method has not undergone significant changes, and still takes into account the critical parameters that are the efficiency of the fans, the thermal efficiency and pressure drop of the heat recovery system (HRS), and the air speed in the cross-section area of the unit. 
Where this new classification marks a major step in terms of energy rating is in the level of demand of each class, as shown in Table 1. For instance, a unit newly A-classified is at least 28% more efficient than a unit formerly A-classified, and a unit formerly at the limit of the old class A is, in the new classification, rated class C. 

Additionally, an A+ class has been introduced allowing to identify the world’s most advanced products in terms of energy efficiency (at least 38% more energy efficient than the former A class).

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