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Extract filter size: 525x185x5 mmSupply filter size: 525x185x24 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
Extract filter size: 525x185x5 mmSupply filter size: 525x185x5 mmFilter class (EN779): G4+G4Filter 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
Extract filter size: 245x177x5 mmSupply filter size: 245x177x5 mmFilter class (EN779): G4+G4Filter 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
Extract filter size: 175x143x5 mmSupply filter size: 175x143x5 mmFilter class (EN779): G4+G4Filter 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
Extract filter size: 290x136x5 mmSupply filter size: 290x136x5 mmFilter class (EN779): G3+G3Filter 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
Extract filter size: 245x177x5 mmSupply filter size: 234x166x20 mmFilter class (EN779): G4+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
Extract filter size: 175x143x5 mmSupply filter size: 164x132x20 mmFilter class (EN779): G4+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
Extract filter size: 290x136x5 mmSupply filter size: 290x136x25 mmFilter class (EN779): G3+M6Filter 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
1-8 of 8Discover our range of replacement filters for your Wolf ventilation unit, all made in the EU! Our selection includes high-performance filter sets combining G4 (ISO Coarse 60%), G3 (ISO Coarse 50%), M6 (ISO ePM10 50%) and F7 (ISO ePM1 55%) filters, designed to protect your system and improve indoor air quality. All our options are quality-tested and fully compatible with Wolf MVHR units.
Model compatibility
This category includes filter sets compatible with all major Wolf MVHR ventilation units, including:
- CWL 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 Wolf units are designed to ensure optimal air quality and system performance by combining two filters with different filtration roles. Available filter options:
- G4 filters (ISO Coarse 60%) and G3 (ISO Coarse 50%) on the extract or supply side: ideal for capturing larger particles like soil particles, large pollen grains, plant debris, insect wings, sawdust, sand and textile lint.
- M6 (ISO ePM10 50%) and F7 filters (ePM1 55%) on the supply side: high-efficiency filters that capture very fine particles, including pollen, pet dander, 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
Our carefully developed house brand filters are made in the European Union by certified manufacturers. They are produced with high-quality materials, under strict ISO 16890 standards to ensure high filtration performance and reliability.
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 Wolf CWL MVHR models (CWL-180, CWL-300/400, CWL-F-150, CWL-F/T-300) does your filter catalogue cover?


We supply filter sets for Wolf's CWL Excellent range — CWL-180, CWL-300/400, CWL-F-150 and CWL-F/T-300 Excellent — the German manufacturer's main residential MVHR line, often installed alongside Wolf heating systems. The model name is printed on the unit's label.
What filter classes are standard in Wolf CWL units?


It depends on the model. For each CWL unit we stock two versions:
- CWL-300/400 Excellent — G3+G3, or G3+F7
- CWL-180 Excellent — G3+G3, or G3+M6
- CWL-F-150 and CWL-F/T-300 Excellent — G4+G4, or G4+F7
The version with the finer supply filter (F7 or M6) is the better choice for pollen and fine dust.
Does pairing a Wolf CWL unit with a Wolf heating system change how often filters need maintenance?


From a filter-maintenance perspective, ventilation and heating functions operate independently, but in combined Wolf systems the recovery unit often runs continuously to support overall home climate control. Because of this, it's worth checking CWL filters towards the shorter end of the standard 3–6 month interval rather than waiting for the maximum period. This is especially relevant in winter, when ventilation intensity combined with heating tends to be higher than in summer.
Do smaller and larger Wolf CWL units use the same filter?


No — filter sizes depend on the model. The CWL-300 and CWL-400 Excellent share one set, while the CWL-180, CWL-F-150 and CWL-F/T-300 each take their own. Confirm your exact CWL variant on the unit's label before ordering, since the series name alone doesn't guarantee a matching size.
Can I order a whole year’s supply of Wolf CWL filters at once?


Yes, ordering a full season's or even a year's worth of CWL filters in one go is a common choice, especially for those who already have a maintenance schedule for their Wolf heating system and want to plan everything together. Ordering several sets at once usually brings the per-unit price down compared to buying one at a time. All you need to do is specify your exact CWL model code so that every filter in the set fits without any issues.
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