Wolf CWL-300/400 Filters
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House brandExtract filter size: 525x185x5 mmSupply filter size: 525x185x24 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
House brandExtract 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
1-2 of 2The Wolf CWL-300 and CWL-400 Excellent share a single filter housing, so one 525x185mm filter set covers both units.
Wolf CWL-300/400 Excellent Filter Set
- G4+G4 (standard) – 525x185x5mm on both sides. From €12.90.
- G4+F7 (upgrade) – 525x185x5mm extract, 525x185x24mm supply. From €24.90.
G4+G4 Standard vs. G4+F7 Upgrade
The standard G4+G4 set handles everyday coarse dust, pollen grains and plant debris on both sides. Stepping up to G4+F7 keeps the G4 extract filter but swaps the supply filter for F7, adding fine-particle protection against pollen, pet dander, bacteria and smog – worth considering if your home is near a busy road or you want stronger allergy protection.
Why CWL-300 and CWL-400 Share One Filter
Wolf built the 300 and 400 on the same casing, varying only the fan capacity, so the filter compartment dimensions are identical across both model numbers. You don’t need to know which exact airflow rating you have – if your unit reads “CWL-300” or “CWL-400” on the label, this is your filter set.
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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.
Can I order a full year’s supply of Wolf CWL filters together, especially if paired with Wolf heating equipment?
Yes, ordering a full year's worth of CWL filter sets in one purchase is common, particularly for households already managing a paired Wolf heating system on a similar service schedule. Multi-set orders are typically priced lower per filter than buying individually.
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 pairing a Wolf CWL unit with Wolf heating affect filter maintenance?
The ventilation and heating functions operate independently in terms of filter maintenance, but combined Wolf systems often run ventilation more consistently to support overall climate control, so it's worth checking CWL filters on the shorter end of the standard 3–6 month interval.
What filter class is standard for 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.
Which Wolf ventilation units 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.
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