Flexit Filters
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House brandExtract filter size: 272x166x48 mmSupply filter size: 272x166x48 mmFilter class (EN779): F7+F7Filter quantity in a set: 2 filtersProtection levelFilter 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
OriginalExtract filter size: 272x166x48 mmSupply filter size: 272x166x48 mmFilter class (EN779): F7+F7Filter quantity in a set: 2 filtersProtection levelFilter 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
House brandExtract filter size: 365x247x31 mmSupply filter size: 365x247x31 mmFilter class (EN779): F7+F7Filter quantity in a set: 2 filtersProtection levelFilter 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
OriginalExtract filter size: 365x247x31 mmSupply filter size: 365x247x31 mmFilter class (EN779): F7+F7Filter quantity in a set: 2 filtersProtection levelFilter 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
House brandExtract filter size: 290x230x48 mmSupply filter size: 290x230x48 mmFilter class (EN779): F7+F7Filter quantity in a set: 2 filtersProtection levelFilter 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
OriginalExtract filter size: 290x230x48 mmSupply filter size: 290x230x48 mmFilter class (EN779): F7+F7Filter quantity in a set: 2 filtersProtection levelFilter 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
OriginalExtract filter size: 459x207x31 mmSupply filter size: 459x207x31 mmFilter class (EN779): F7+F7Filter quantity in a set: 2 filtersProtection levelFilter 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
OriginalExtract filter size: 270x242x95 mmSupply filter size: 270x242x95 mmFilter class (EN779): F7+F7Filter quantity in a set: 2 filtersProtection levelFilter 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
House brandExtract filter size: 419x192x31 mmSupply filter size: 419x192x31 mmFilter class (EN779): F7+F7Filter quantity in a set: 2 filtersProtection levelFilter 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
OriginalExtract filter size: 335x130x113 mmSupply filter size: 335x130x113 mmFilter class (EN779): F7+F7Filter quantity in a set: 2 filtersProtection levelFilter 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
House brandExtract filter size: 459x207x31 mmSupply filter size: 459x207x31 mmFilter class (EN779): F7+F7Filter quantity in a set: 2 filtersProtection levelFilter 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
House brandExtract filter size: 335x130x113 mmSupply filter size: 335x130x113 mmFilter class (EN779): F7+F7Filter quantity in a set: 2 filtersProtection levelFilter 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
OriginalExtract filter size: 350x185x48 mmSupply filter size: 350x185x48 mmFilter class (EN779): F7+F7Filter quantity in a set: 2 filtersProtection levelFilter 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
OriginalExtract filter size: 419x192x31 mmSupply filter size: 419x192x31 mmFilter class (EN779): F7+F7Filter quantity in a set: 2 filtersProtection levelFilter 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
1-14 of 14Discover our range of replacement filters for your Flexit ventilation unit, all made in the EU! Our selection includes high-performance F7 (ISO ePM1 55%) filters sets, designed to protect your system and improve indoor air quality. Whether you’re looking for original Flexit filters or affordable house brand alternatives, all our options are quality-tested and fully compatible with Flexit MVHR units. Model compatibility
This category includes filter sets compatible with all major Flexit MVHR ventilation units, including:
- Econordic series
- Nordic series
- SL4R series
- Uni series
To ensure the right fit, it’s important to know the exact model of your ventilation unit, as different models require different filters. You’ll find helpful tips on identifying your device in the FAQ section.
Filter types and what they protect against
Our replacement filter sets for Flexit units are designed to ensure optimal air quality and system performance through dual F7 filtration:
- F7 filters (ISO ePM1 55%) on the extract and supply side: high-efficiency filters that capture very fine particles, including bacteria, smog, tobacco smoke particles, combustion dust, spores, and wildfire smoke particles.
Usage and maintenance
To keep your MVHR system running efficiently and your indoor air clean, we recommend replacing the filters every 3–6 months. However, this depends on your environment, if you have pets, or nearby construction.
To make the process easy, we provide step-by-step replacement instructions for each filter model. You can find them under the “How to change” tab on every product page.
Manufacturing quality you can trust
The original Flexit filters are manufactured in both Norway and Sweden, developed to meet strict Scandinavian and European standards. Our carefully developed house brand filters are also made in the European Union by certified manufacturers. Both are produced with high-quality materials, under strict ISO 16890 standards to ensure high filtration performance and reliability.
Customer Reviews
Orginalus kokybiški filtrai, malonus aptarnavimas ir konsultacija
Mykolas TamulynasFacebook review
Patys geriausi atsiliepimai. Užsakytų filtrų grąžinimas, jei neteisingus užsakėte, galima grąžinti nemokamai.
Jūrate JokubauskienėGoogle review
Greitas ir kokybiškas aptarnavimas. Geras kainos/ kokybės santykis. Rekomenduoju!Ingrida BaltuškienėGoogle review
Pirkome rekuperatoriaus filtrus internetu, viskas buvo sklandu, puslapiu patogu naudotis, prekes gavome itin greitai.Monika BijeikytėGoogle review
Super aptarnavimas, nuoširdžiai rekomenduoju apsilankyti!!!
Pavel KoliatoFacebook review
Patenkintas dėl to kad įmonė labai operatyviai ir sklandžiai veikiaAnatolij DrozdovičGoogle review
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.
Which Flexit models (Nordic S2/S3, S4, CL, UNI and others) do you sell filters for?
We supply filter sets for Flexit's most widely used residential lines — Nordic S2/S3, S4 and CL2/CL3/CL4, UNI 2, UNI 3 and UNI 4, Econordic W4/WH4 and SL4R — common across Norway and the other Nordic countries. For Nordic and UNI units you can choose between Flexit originals and our house brand. The model designation is usually printed on the label on the front panel.
What filter class does Flexit use in its Nordic and UNI units?
Our house brand Flexit sets are F7+F7 — a fine F7 (ePM1) filter on both the supply and extract side — and the Econordic W4/WH4 and SL4R originals are F7+F7 as well. That protects the heat exchanger and gives strong filtration of fine dust and pollen in the incoming air.
Why do Flexit filters often need to be changed more frequently in winter?
Flexit heat exchangers are optimised to work in sub-zero temperatures, so during the cold season the unit often runs at a higher and steadier airflow to maintain heat recovery efficiency. Because of this more intensive operation, filters can fill up somewhat faster than in the warmer months, so it's worth doing an extra check in the middle of winter rather than waiting for your usual schedule. In Norwegian this is called “filterbytte” – filter changing – and the term is often mentioned in Flexit user manuals as well.
How do I replace the filter myself in a Flexit SL4R or similar model?
The filter compartment on Flexit MVHR units is reached by opening the front cover without any tools – usually loosening the latches or screws by hand is enough. Switch the unit off before opening the cover. After removing the old filter, check the airflow direction arrow on the new filter's frame and insert it in the same orientation. If you're unsure of the exact steps for your model (e.g. SL4R), follow that model's user manual, as the procedure can differ slightly between models.
Can I order Flexit filters in bulk for a homeowners’ association or several apartments?
Yes, we accept wholesale orders:
- for apartment building homeowners' associations
- for managers overseeing several buildings
- for landlords with multiple Flexit units
A larger discount per unit applies above a certain quantity. Send us the models of your units and the quantity needed – we'll prepare a consolidated order with enough filters for every MVHR unit in the building.
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