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Extract filter size: 257x180x47 mmSupply filter size: 257x180x47 mmEfficiency (EN779): G4+F7Quantity: 2 filtersProtection level
Filter protection level indicates efficiency in blocking particles or contaminants, varying by standard and application.
BasicBasic protects from basic stuff
Smog and pollenSmog and pollen, Smog and pollen, Smog and pollen, Smog and pollen, Smog and pollen, Smog and pollen, Smog and pollen, Smog and pollen
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Frequently Asked Questions
Frequently asked questions ordered by popularity.


Filter class refers to the size and amount of particles a filter can trap. The higher the classification, the more effectively the filter removes particles from the air.
For incoming outdoor air, it’s generally recommended to use higher-class filters. However, we always suggest following the manufacturer’s guidance and using the specific filter sets outlined in your unit’s eco-commissioning documentation.
For more information, take a look at our comprehensive guide to filter classes for heat recovery units.






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