Defro DRX V / OPTI V filter set M5+M5 (original)
Defro DRX V / OPTI V filter set M5+M5 (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
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 models:
- Defro DRX 300 V
- Defro DRX 400 V
- Defro DRX 500 V
- Defro DRX OPTI 300 V
- Defro DRX OPTI 400 V
- Defro DRX OPTI 500 V
- Defro DRX OPTI 250 V S
- Defro DRX OPTI 300 H
- Defro DRX OPTI 400 H
- Defro DRX OPTI 500 H
- Defro DRX OPTI 350 F
- Defro DRX OPTI 450 F
What filter set protects against
Filter set includes 2 filters:
- Extract filter – M5 (ePM10 55%) – for MVHR protection
- Supply filter – M5 (ePM10 55%) – for indoor air protection
This filter set follows the ISO 16890 standard for particle filtration efficiency.
The M5 filters capture around 55% of particles that are 10 microns or larger, such as pollen, mould spores, pet dander, and house dust. One of them filters the air extracted from your indoor space and protects the MVHR unit; while the other cleans the outdoor air supplied into your premises, improving indoor air quality and protecting your health. This helps reduce visible dust, lowers energy consumption, keeps the system running quietly, and extends its lifespan.
Usage and maintenance
Defro recommends replacing the filters every 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 manufactured by Defro, a trusted partner we’ve worked with for many years. We purchase all products directly from them, ensuring authenticity and consistent quality. Defro’s manufacturing facilities, based in Poland, uphold strict European production standards. Their advanced filtration technologies and rigorous testing processes guarantee optimal particle retention, airflow efficiency, and product reliability.
These panel filters are made using Z-line technology, with densely folded filter media mounted in a cardboard frame. Such design maximises the filtration surface area, enhancing particle retention and airflow efficiency. This kind of construction offers a larger effective filtration area, more uniform airflow distribution, improved particle capture, and a lower pressure drop.
By using original Defro filters, you guarantee that your ventilation system performs according to the manufacturer’s specifications, maintaining both optimal indoor air quality and energy efficiency.
| 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 |
Filter Replacement Instructions for Defro DRX V / OPTI V:
- Turn off the unit: Ensure the unit is powered off and disconnected from the electrical supply to prevent any accidents.
- Access the filter compartment: Locate the filter compartment, accessible via the front panel.
- Remove the old filters: Carefully remove the existing filters. Note the orientation and position of the filters for proper installation of the new ones.
- Install new filters: Place the new filters into the compartment, ensuring they are correctly oriented and seated properly.
- Reassemble the unit: Replace any panels or covers that were removed during the process.
- Power on the unit: Reconnect the unit to the electrical supply and power it on.
Order Processing Time
All in-stock products are dispatched within 1–2 business days, except for clearly marked items with an extended dispatch time (5–10 business days).
Shipping Costs
Shipping is free for all orders over €59. For orders up to €59, shipping costs will be calculated at checkout.
Order Tracking
Once your order has been dispatched, we will send you a confirmation email with tracking details so you can easily follow its journey to you.
Business Days
Delivery times are calculated in business days – from Monday to Friday, excluding public holidays.
Easy returns within 30 days
You may return any product within 30 days of receiving it for a full refund – no questions asked!
If you need to return items after 30 days, please contact us. We review these requests on a case-by-case basis and will do our best to help.
Condition of returned products
We accept returns of products unused in intact condition, including those unpacked but not damaged. Products that are damaged, dirty, or otherwise unusable cannot be accepted for return.
Defective or incorrect items
If you receive a defective or incorrect product, please contact us immediately. We will ensure the issue is resolved promptly, as your satisfaction is our top priority.
How to return an item?
Please contact us before sending back any products. We will provide you with the return shipping details and assist you throughout the process. We cover all costs of return shipping.
Refund processing timeline
Once your returned product is delivered to us, we will verify its condition within 5 working days. Refunds will be processed within an additional 5 working days after approval, using the original payment method.
Is it possible to cancel my order?
Yes, cancellations are possible before your order has been shipped.
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