Wolf CWL-F/T-300 filters
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House brandExtract 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
House brandExtract 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
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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.
Does using a compatible Wolf CWL filter instead of an original affect the warranty?
No. The filter is a consumable part, not a structural component, so using a correctly sized, correctly classed compatible filter does not affect the warranty on the CWL unit's heat exchanger, fans or electronics – that warranty covers manufacturing defects, not the brand of filter you fit. What matters is that the compatible filter matches the original's dimensions and filtration class (G3 or G4, combined with G3, G4, M6 or F7 depending on the CWL model) so airflow and pressure drop stay within the unit's design range.
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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