Wolf CWL-300/400 Excellent filter set G3+G3 (house brand)
Wolf CWL-300/400 Excellent filter set G3+G3 (house brand)
Filter protection level indicates efficiency in blocking particles or contaminants, varying by standard and application.
General dust and particle filtration
Filter protection level indicates efficiency in blocking particles or contaminants, varying by standard and application.
Certified quality to international ISO standards
Manufactured entirely within the European Union
Effective filtration for up to 6 months.
Model compatibility
Compatible with the following models:
- Wolf CWL‑300 Excellent
- Wolf CWL‑400 Excellent
What filter set protects against
Filter set includes 2 filters of different efficiency classes:
- Extract filter – G3 (Coarse 50%) – for MVHR protection
- Supply filter – G3 (Coarse 50%) – for indoor air protection
This filter set follows the ISO 16890 standard for particle filtration efficiency.
The G3 filters capture up to 50% of coarse airborne particles that are larger than 10 microns, such as household dust, textile lint, animal hair, large pollen grains and similar debris. One of them filters the air extracted from your indoor space and protects the MVHR unit by reducing visible dust and general build-up in the ventilation system. Meanwhile, the other one cleans the outdoor air supplied into your premises, improving indoor air quality and protecting your health.
Usage and maintenance
Salda recommends replacing the filters every 3-6 months, to ensure optimal air quality and system performance.
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's time to replace them.
Manufacturing quality
This filter set is part of our carefully developed house brand, manufactured in the European Union by our trusted partners who meet our strict quality standards. We work closely with each production partner and perform our own quality control checks to ensure every filter delivers reliable performance and consistent quality.
These filters are constructed with a durable galvanized wire frame that resists moisture and deformation, ensuring long-term structural stability. The filter media is made from premium-quality non-woven synthetic fibres - safe, resilient, and highly effective at capturing coarse airborne particles. While the appearance may differ from original Electrolux filters, they are fully compatible with the specified models and deliver reliable filtration.
Original product codes
- 1669013
| 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 are provided in the manual below:
Frequently Asked Questions
Frequently asked questions ordered by popularity.
Filter class refers to the size and amount of particles a filter can trap. The higher the classification, the more effectively the filter removes particles from the air.
For incoming outdoor air, it’s generally recommended to use higher-class filters. However, we always suggest following the manufacturer’s guidance and using the specific filter sets outlined in your unit’s eco-commissioning documentation.
For more information, take a look at our comprehensive guide to filter classes for heat recovery units.
It is recommended to change the filters in your HRV every 3 to 6 months, depending on how dirty they become. However, the key signs that your filters need replacing include:
- An increase in noise from the HRV
- A reduction in the amount of air being supplied or extracted
Smart HRVs with an electronic control panel and display screen show the volume of air supplied and extracted per hour.
For example, if a Zehnder ComfoAir Q350 HRV in a 140m² home operates at an optimal rate of 190m³ per hour but drops to 150–170m³, the filters should be replaced.
- Check the label on the unit itself, which usually displays the manufacturer and model number.
- Contact your installer or the developer/builder of your property for details.
- Measure the width, length, and height of the filter, then use these measurements to browse our online shop. Our system will suggest the correct recuperator filters for your unit.
- If none of the above help, please get in touch via the chat box at the bottom right of the page, and we’ll be happy to assist you.
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