In the course of the Revision of Fan Regulation 327/2011, Eurovent and EVIA found that the proposed energy efficiency requiremnts for High pressure/Low volume (HPLV) fans have been set too high. If the Regulation would be implemented as it is today, it would phase out about three-quarters of the current HPLV fans. This statement is substituted by the fact that HPLV applications have a much higher friction loss level than other applications and thus a considerable lower efficiency level.
Eurovent and EVIA propose either one of the two solutions below:
- Fans with specific speed σbep<0,12 (HPLV fans) remain in the scope of the fan regulation, but without fan energy efficiency requirement. Information requirements have to be met, or
- The fan energy efficiency requirement for HPLV fans can be set depending on the specific speed σbep by means of a linear function.
