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Extract filter size: 257x180x47 mmSupply filter size: 257x180x47 mmFilter class (EN779): G4+F7Filter quantity in a set: 2 filtersProtection level
Filter protection level indicates efficiency in blocking particles or contaminants, varying by standard and application.
BasicGeneral dust and particle filtration
Pollen and moldCaptures pollen, mold spores, and other allergens
Smog and bacteriaProtects against allergens and urban pollution
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Customer Reviews
Need Help? Start Here.
We’ve gathered answers to the most common questions about our products and services. If you can’t find an answer here, please contact us directly.
I have a NIBE heat pump — does that mean I also have a NIBE ventilation unit?


Not necessarily. NIBE is primarily known for heat pumps, but its ERS series ventilation units are often installed alongside NIBE heating systems in the same property, sharing the same brand but functioning independently. Check the ventilation unit itself, not the heat pump nameplate, to identify the correct filter model.
What filter class do NIBE ERS units use?


The NIBE ERS 20-250 filter set we stock pairs two classes:
- G4 coarse filter
- F7 (ePM1) fine filter
The G4 filter keeps coarse dust off the heat exchanger, while the F7 filter cleans the incoming air of fine dust and pollen.
Does filter condition affect my NIBE system’s heating efficiency?


Yes — in integrated NIBE systems, ventilation air quality and heat recovery efficiency work alongside the heat pump to manage indoor climate and energy use. A clogged ventilation filter can force the system to work harder to maintain target temperatures, so regular filter changes support both air quality and heating costs.
How quickly can you deliver NIBE ERS filters within Belgium?


In-stock NIBE ERS filters are dispatched within 24 to 48 hours and typically arrive in about 4 to 5 business days anywhere in Belgium, with free delivery from €100. Since NIBE ERS units are often installed alongside a NIBE heat pump, keeping a spare set on hand avoids any disruption to either system while waiting for a replacement to arrive.
Can I buy NIBE ERS extract and supply filters together as a matched pair, or do they need separate ordering?


They come together. We sell the NIBE ERS 20-250 filters as a matched G4+F7 set, since both filters are normally replaced at the same time — it saves ordering, and paying for delivery, twice.
How is the required ventilation rate for our NIBE ERS worked out in Belgium?


Belgian energy performance rules start from a design flow of 3.6 m³ per hour for every square metre of floor area in the dwelling; the installer sizes the unit and sets the flows so the home can reach that. Your NIBE ERS was commissioned against those figures with clean filters in place. What is worth knowing afterwards is that a loaded filter is the single most common reason a system commissioned correctly stops reaching its design flow — the unit either runs the fans harder to compensate, using more electricity, or quietly delivers less air than intended. That is why the filter interval matters as much for compliance as the equipment choice did.
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