Enervent (by Zehnder) Salla filter set M5+F7 (original)
Enervent (by Zehnder) Salla filter set M5+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
Effective filtration for up to 6 months.
Model compatibility
Compatible with the following models:
- Enervent Salla
- Enervent Salla Compact
What the filter set protects against
The filter set includes 2 filters:
- Extract filter – M5 (ePM10 60%) – protects the heat recovery unit
- Supply filter – F7 (ePM1 55%) – protects the air you breathe indoors
The set follows the ISO 16890 standard for particle filtration efficiency. The M5 filter captures around 60% of particles up to 10 microns, including pollen, mould spores, coarse dust and cement dust. It cleans the air extracted from your rooms before it passes through the heat exchanger. The F7 filter captures around 55% of very fine particles as small as 1 micron, including bacteria, smog, tobacco smoke particles, combustion dust, spores and wildfire smoke particles. It cleans incoming outdoor air before it enters your home.
Usage and maintenance
Zehnder recommends replacing the filters every 6 months to keep air quality and system performance at their intended level. How often they actually need changing depends on:
- Air pollution levels (urban versus rural surroundings)
- Allergies or respiratory sensitivities in the household
- Pets indoors, or smoking
- Dust from nearby construction work
If your unit has a filter change indicator, follow its alerts. Otherwise check the filters by eye — if they look heavily soiled or clogged, replace them.
About Enervent and manufacturing quality
Enervent is a Finnish ventilation manufacturer based in Porvoo, where it has built heat recovery units for over 40 years. It has been part of the Zehnder Group since 2018. Enervent is known for units that combine heat recovery with an integrated heat pump and its own energy management technology, designed for Nordic conditions — which is also why its filters see long heating seasons and benefit from being changed on schedule.
This filter set is manufactured by Zehnder and purchased directly from them, so authenticity and consistent quality are assured. The filters use Minipleat construction, in which the filter medium is folded into many shallow, closely spaced pleats. That packs a large filtration area into a slim frame and keeps air resistance low, so the unit works less hard to move the same air. Using original filters keeps the system operating within the manufacturer's stated technical data.
Original product codes
- 471010944
- 7935886
| 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 |
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 €75. For orders up to €75, 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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