Vallox 125 filter set No. 35 G4+G4+F7 (original)
Vallox 125 filter set No. 35 G4+G4+F7 (original)
Filter protection level indicates efficiency in blocking particles or contaminants, varying by standard and application.
General dust and particle filtration
Captures pollen, mold spores, and other allergens
Protects against allergens and urban pollution
Key features of this product
Certified quality to international ISO standards
Manufactured entirely within the European Union
Effective filtration for up to 6 months.
Price for set
Model compatibility
Compatible with the following model:
- Vallox 125
These filters are for balanced ventilation with heat recovery – known in Belgium as ventilation system D.
What this filter set protects against
The filter set includes 3 filters of different efficiency classes:
- 2 × G4 filters (Coarse 75%) – for coarse-particle filtration and MVHR protection
- 1 × F7 filter (ePM1 55%) – for incoming-air filtration and indoor air protection
This filter set follows the ISO 16890 standard for particle filtration efficiency. The G4 filters capture approximately 75% of coarse airborne particles, including household dust, larger pollen grains, fibres, sand, sawdust, plant debris and insects. They help reduce dirt accumulation inside the ventilation unit, keeping the heat exchanger, fans and air ducts cleaner. This supports efficient airflow, reduces unnecessary strain on the system and helps extend the unit’s service life.
The F7 filter captures approximately 55% of fine particles as small as 1 micron, including fine pollen, mould spores, bacteria-carrying particles, smog, combustion dust and smoke particles. It cleans incoming outdoor air before it enters your home, helping improve indoor air quality and providing additional protection for people affected by allergies or respiratory sensitivities.
Usage and maintenance
To ensure optimal air quality and reliable ventilation-system performance, inspect the filters regularly and replace them when they become dirty or clogged. Under typical operating conditions, filters should usually be replaced every 3–6 months. However, replacement frequency may vary depending on factors such as:
- Air pollution levels (e.g. urban vs rural areas)
- Allergies or respiratory sensitivities
- Indoor pets or smoking
- Dust from nearby construction sites
If your system includes a filter change indicator, follow its alerts. Otherwise, check the filters visually – if they appear very dirty or clogged, it is time to replace them.
Manufacturing quality
This is an original Vallox filter set manufactured by Vallox for the Vallox 125 ventilation unit. Original filters are produced according to the ventilation-unit manufacturer’s technical requirements, helping maintain the intended airflow, filtration performance and energy efficiency of the system.
The set combines synthetic filter-material elements with a panel filter manufactured using Z-line technology. The folded filter structure increases the effective filtration surface area, improving particle capture and dust-holding capacity while maintaining suitable airflow through the ventilation unit. By using original Vallox filters, you help ensure that your MVHR system continues to operate according to the manufacturer’s stated technical specifications.
Original product codes
- 4122005
- 7912213
| Filter Type / EN 779 Class | ISO 16890 Class | Efficiency (%): Coarse (>10 µm) | PM10 (≤10 µm) | PM2.5 (≤2.5 µm) | PM1 (≤1 µm) | Gas/VOC Removal | Real-Life Particle & Pollutant Examples |
|---|---|---|---|---|---|---|---|
| G1 | ISO Coarse | ~40% | <10% | ~0% | ~0% | Sand, textile fibers, carpet fluff, plant debris, insect wings, visible lint | |
| G2 | ISO Coarse | ~50% | <15% | ~0% | ~0% | Sawdust, hair, coarse textile particles, large flakes of paint or rust | |
| G3 | ISO Coarse | ~60% | <25% | ~5% | ~0% | Coarse dust, lint, animal hair, some pollen | |
| G4 | ISO Coarse | 65-75% | 25-35% | 10-15% | <5% | Large pollen grains, soil particles, textile lint | |
| M5 | ISO ePM10 ≥50% | ~80% | 50–65% | 20–30% | 10–15% | Pollen, mold spores, pet dander, house dust | |
| M6 | ISO ePM10 (60–80%) | ~90% | 65–80% | 30–45% | 15–25% | Building/construction dust, concrete dust, ash particles, fine cement dust | |
| F7 | ISO ePM2.5 (50–65%) | >90% | 75–90% | 50–65% | 30–45% | Bacteria, smog, tobacco smoke particles, combustion dust, spores, wildfire smoke particles | |
| F8 | ISO ePM2.5 (65–80%) | >95% | 85–95% | 65–80% | 45–60% | Fungal spores, air pollution aerosols | |
| F9 | ISO ePM1 (80–95%) | >95% | >95% | >90% | 80-95% | Diesel soot, airborne viruses, smoke from traffic and industry, combustion particles, ultra-fine dust, secondary organic aerosols from chemical reactions in air | |
| Activated Carbon | Not classified (gas filter) | Varies (combined with prefilter) | Varies | Varies | Varies |
High Efficiency |
Volatile Organic Compounds (VOCs), formaldehyde, ozone, nitrogen dioxide (NO₂), sulfur dioxide (SO₂), benzene, toluene, cooking odors, cigarette smoke odors, pet smells, perfumes |
Instructions for changing the filters can be found in the operating manual (section “Replacing the filters”, p. 12): Vallox 125 MV manual
Shipping and delivery
We process your order as quickly as possible. Dispatch time depends on the availability of your filters.
When is your order dispatched?
- In stock: dispatched within 24–48 hours.
- Not in stock: dispatched within 5–15 business days.
If a product page states a different dispatch time, that time applies.
Delivery times with DPD
After dispatch, DPD delivers your parcel to your door or to a DPD Pickup point of your choice:
| Country | Delivery time |
|---|---|
| Belgium | 2–4 business days |
| Netherlands | 2–4 business days |
| France | 2–4 business days |
| Luxembourg | 2–4 business days |
Delivery time starts once your order has been dispatched and comes on top of the dispatch time.
Shipping costs
Free shipping on orders from €100. For smaller orders, shipping costs are shown at checkout based on your delivery address.
Track your order
Once your order has been dispatched, you receive a shipping confirmation with tracking details, so you can follow your parcel easily.
Easy returns within 30 days
You can return your order within 30 days of receipt for a full refund, provided the products meet our return conditions.
Unpacked products are also accepted, as long as they are unused, undamaged and in good condition. Damaged, dirty or unusable products cannot be returned.
Want to return something after 30 days? Contact us. We review each request individually and are happy to help.
How to return a product
Please contact us before returning anything. We will send you the return instructions and guide you through the rest of the process.
Filter Direct pays the return shipping costs.
Received a wrong or damaged product?
Received a wrong or defective product? Contact us as soon as possible and we will help you resolve it.
Refunds
Once we receive your return, we check the condition of the products within 5 business days.
Once the return is approved, we process the refund within 5 business days to your original payment method.
Cancelling an order
You can cancel your order as long as it has not been dispatched. Refunds for cancelled orders are processed within 5 business days.
Business days
Dispatch and delivery times are calculated in business days, Monday to Friday, excluding public holidays.
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