Flexit Filters
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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
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
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
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
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: 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
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: 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: 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
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: 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: 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
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
The experience was seamless, they communicated well, and I got what I ordered quickly. I also found a product that I didn’t know existed, and ordered it as well. All in all, an excellent experience!
Steve SchaferTrustpilot review
Top, fast shipment, good productTim SoenenTrustpilot review
Get what I ordered, cheaper than in my country (post service included).MatejTrustpilot review
Fast and easy to orderPeter PostruznikTrustpilot review
Everything was ok but it took like a week to receive the order when it appeared as completed in the status. Maybe more reliable information on the delivery process would be appreciated.Toni AlmansaTrustpilot review
Most important: No fake shop 🙂 (i wos looking for an impressum and country of operating headquarters). Summary: Fast delivery. Moderate price. Good Quality. Quick and easy purchase. Good online-Shop. I miss Paying with Paypal.Hans-dieter TinhofTrustpilot review
Very good product and good priceCARLOS MARTINSTrustpilot 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.
Can I order Flexit filters in bulk for a housing association or multiple properties?
Yes, we handle bulk orders for:
- Housing associations
- Property managers
- Landlords with multiple Flexit installations
Volume pricing is available above a set quantity — contact us with your unit models and quantities and we can put together a consolidated order and delivery schedule.
Do Flexit units in cold climates need special low-temperature filters?
No, standard filters are fine. The F7 filter media in our Flexit sets handles the temperature and humidity swings of Nordic installations, so no special low-temperature filter is needed. What matters more is checking the filters a little earlier in winter, when higher sustained airflow can bring the change forward.
Why do Flexit units sometimes need filters changed more often in winter?
Flexit's heat exchangers are optimised for sub-zero climates, and units often run at higher, more consistent airflow through cold months to maintain heat recovery efficiency. That steadier airflow can mean filters reach saturation a little sooner than in milder seasons, so a mid-winter check is worthwhile.
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.
Which Flexit models do you stock 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.
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