At last, buyers of air filters will find it a lot easier to find the right filter–
regarding both energy efficiency and indoor air quality. Eurovent‘s new,
objective energy efficiency classification has now been implemented.
Now all air filters can be graded from A+ to E – A+ for the lowest energy
consumption and E for the highest.
The classification is based on EN779:2012 and will give you a good understanding of annual energy consumption, initial efficiency and minimum efficiency. Higher demands. As the price of energy increases and the demands of reducing CO2 emissions get tougher, the energy consumption related to air filters has become the focus of attention. Currently, air filters are classified only by their average efficiency. The new energy classification is far more precise.
The energy consumption of air filters can be determined as a function of the volume flow rate, the fan efficiency, the operation time and the average pressure drop. Due to the dust loading during operation, the pressure drop of an air filter is constantly increasing. The related energy consumption during a certain period of time can be calculated from the integral average of the pressure drop over this period of time.
Eurovent Energy Efficiency label
The new labeling system will be displayed on standard filter boxes. There are two different ways of execution.
1. Full size 592x592, to EN 15805
- Filter class
- Nominal air flow rate, m3/s
- Initial efficiency, % (F7-F9)
- Minimum efficiency, % (F7-F9)
- Annual Energy Consumption, kWh/annum
- Energy class
2. Other ”family” sizes of standard filters
- Filter class, according to 592x592
- Energy class, according to 592x592
Put your supplier to the test.
Many suppliers do not test their filters properly, making it impossible for customers to compare different brands. At Camfil, we test all our filters to guarantee a high standard of quality. Does your air filter supplier have what it takes?
- Is the supplier certified by Eurovent?
- Are there labels on all boxes?
- Are all tests based on EN 779:2012?
- Is there a test protocol for validation?
Calculation and classification
The standard measures both filtration efficiency and pressure drop as a function of dust loading. A representative energy consumption level is calculated using the mean pressure drop difference averaged over the course of dust loading. On the basis of these figures, the energy performance of a filter over an operating period of one year is simulated in a laboratory. This representative energy value is used for a classification of air filters into energy classes.
The calculation used in the energy efficiency classification by Eurovent document 4/21 - 2014.
Click to enlarge tabel
*Certified values are to be find at: www.eurovent-certification.com