Replacement filters for home ventilation that aim to keep household air free from coarse dust and debris. Quick, tool-free swaps and a spare in the pack suit busy households and landlords, vhbw Filter G4 Replacement for Viessmann WUS-25-4. Are these filters the sensible choice for routine extractor-fan maintenance?
⚡ At a Glance
- • Filtration Performance: G4-class media captures coarse dust, hair and insects while allowing normal airflow
- • Best for: Homeowners and maintenance teams needing simple, regular filter swaps
- • Not ideal for: Homes requiring fine particle or pollen filtration beyond coarse dust control
G4 filter class targets larger particles commonly found in domestic ventilation. Slim plastic frame slides into extractor fan slots for tool-free replacement.
Cleaner indoor air – with G4-rated coarse filtration
G4 filter class denotes coarse-grade filtration, trapping larger particulates such as household dust, hair and insects within the fibrous filter medium. The media reduces the quantity of debris recirculated by mechanical ventilation.
Captures common sources of dust and visible debris, helping to keep extractors and ducts cleaner and making the home more comfortable for occupants sensitive to coarse particles.
Fast, tool-free swaps – with slot-fit design
Dimensions of 26 x 17.8 x 2.3 cm and a lightweight plastic frame allow the filter to slide into extractor fan slots without screws or additional fastenings. The description specifies filter exchange without tools.
Maintenance becomes quicker and less fiddly, so busy households can replace filters during short cleaning routines or between tenancies without specialist tools.
Immediate spares to hand – thanks to the two-pack set
Two identical G4 filters are supplied in the set, each listed as weighing 46 g and finished in white plastic to match typical housing interiors. The set is shown as replacement for Viessmann WUS-25-4, 245045.
Having a spare means less downtime while waiting for replacements, and simplifies staggered swaps so filtration remains continuous.
✨ The 4 Key Reasons for vhbw Filter G4 Replacement for Viessmann WUS-25-4
- G4 filter class - Captures coarse dust, hair and insects for cleaner airflow
- Tool-free slot fit - Enables quick swaps without screws or specialist tools
- Two filters included - Keeps a spare ready for immediate replacement when needed
- Compatible with Viessmann WUS-25-4 - Direct substitute for part number 245045 to ensure correct fit
📋 Technical Details at a Glance
- Category: Home ventilation filter replacement
- Filter class: G4 (coarse particle filtration)
- Compatible models: Replacement for Viessmann WUS-25-4, 245045
- Size (L x W x D): 26 x 17.8 x 2.3 cm
- Material: Plastic frame with G4 filter media
❓ Frequently Asked Questions
Q: Are these filters compatible with my Viessmann extractor fan?
A: Yes, listed as a replacement for Viessmann WUS-25-4, part number 245045, so they fit fans designed for that spare.
Q: Do I need tools to change the filters?
A: No, filter exchange is described as tool-free, with the filters designed to insert into extractor fan slots without additional fastenings.
Q: What kind of particles do the G4 filters capture?
A: G4 class targets coarse particles, filtering out things like coarse dust, hair and insects rather than fine pollen or ultrafine particles.
🏆 Our Verdict
Suitable for homeowners, landlords and maintenance teams who need straightforward, regular filter swaps for extractor fans. The key selling point is a G4-rated, slot-fit replacement set that includes a spare for uninterrupted filtration. While filters are a recurring purchase, the two-pack and easy replacement make maintenance simple and deliver dependable value over time.
