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Extract filter size: 800x450x46 mmSupply filter size: 800x450x46 mmFilter class (EN779): M5+M5Filter quantity in a set: 2 filtersProtection level
Filter protection level indicates efficiency in blocking particles or contaminants, varying by standard and application.
BasicGeneral dust and particle filtration
Pollen and moldCaptures pollen, mold spores, and other allergens
Extract filter size: 800x450x46 mmSupply filter size: 800x450x46 mmFilter class (EN779): M5+F7Filter quantity in a set: 2 filtersProtection levelFilter protection level indicates efficiency in blocking particles or contaminants, varying by standard and application.
BasicGeneral dust and particle filtration
Pollen and moldCaptures pollen, mold spores, and other allergens
Smog and bacteriaProtects against allergens and urban pollution
Extract filter size: 800x400x46 mmSupply filter size: 800x400x46 mmFilter class (EN779): M5+M5Filter quantity in a set: 2 filtersProtection levelFilter protection level indicates efficiency in blocking particles or contaminants, varying by standard and application.
BasicGeneral dust and particle filtration
Pollen and moldCaptures pollen, mold spores, and other allergens
Extract filter size: 800x400x46 mmSupply filter size: 800x400x46 mmFilter class (EN779): M5+F7Filter quantity in a set: 2 filtersProtection levelFilter protection level indicates efficiency in blocking particles or contaminants, varying by standard and application.
BasicGeneral dust and particle filtration
Pollen and moldCaptures pollen, mold spores, and other allergens
Smog and bacteriaProtects against allergens and urban pollution
Extract filter size: - mmSupply filter size: 558x287x46 mmFilter class (EN779): M5Filter quantity in a set: 1 filterProtection levelFilter protection level indicates efficiency in blocking particles or contaminants, varying by standard and application.
BasicGeneral dust and particle filtration
Pollen and moldCaptures pollen, mold spores, and other allergens
Extract filter size: - mmSupply filter size: 558x287x46 mmFilter class (EN779): F7Filter quantity in a set: 1 filterProtection levelFilter protection level indicates efficiency in blocking particles or contaminants, varying by standard and application.
BasicGeneral dust and particle filtration
Pollen and moldCaptures pollen, mold spores, and other allergens
Smog and bacteriaProtects against allergens and urban pollution
Extract filter size: - mmSupply filter size: 371x287x46 mmFilter class (EN779): M5Filter quantity in a set: 1 filterProtection levelFilter protection level indicates efficiency in blocking particles or contaminants, varying by standard and application.
BasicGeneral dust and particle filtration
Pollen and moldCaptures pollen, mold spores, and other allergens
Extract filter size: - mmSupply filter size: 371x287x46 mmFilter class (EN779): F7Filter quantity in a set: 1 filterProtection levelFilter protection level indicates efficiency in blocking particles or contaminants, varying by standard and application.
BasicGeneral dust and particle filtration
Pollen and moldCaptures pollen, mold spores, and other allergens
Smog and bacteriaProtects against allergens and urban pollution
Extract filter size: - mmSupply filter size: 371x235x46 mmFilter class (EN779): M5Filter quantity in a set: 1 filterProtection levelFilter protection level indicates efficiency in blocking particles or contaminants, varying by standard and application.
BasicGeneral dust and particle filtration
Pollen and moldCaptures pollen, mold spores, and other allergens
Extract filter size: - mmSupply filter size: 371x235x46 mmFilter class (EN779): F7Filter quantity in a set: 1 filterProtection levelFilter protection level indicates efficiency in blocking particles or contaminants, varying by standard and application.
BasicGeneral dust and particle filtration
Pollen and moldCaptures pollen, mold spores, and other allergens
Smog and bacteriaProtects against allergens and urban pollution
Extract filter size: 368x375x46 mmSupply filter size: 368x375x46 mmFilter class (EN779): M5+M5Filter quantity in a set: 2 filtersProtection levelFilter protection level indicates efficiency in blocking particles or contaminants, varying by standard and application.
BasicGeneral dust and particle filtration
Pollen and moldCaptures pollen, mold spores, and other allergens
Extract filter size: 368x375x46 mmSupply filter size: 368x375x46 mmFilter class (EN779): M5+F7Filter quantity in a set: 2 filtersProtection levelFilter protection level indicates efficiency in blocking particles or contaminants, varying by standard and application.
BasicGeneral dust and particle filtration
Pollen and moldCaptures pollen, mold spores, and other allergens
Smog and bacteriaProtects against allergens and urban pollution
Extract filter size: 370x360x46 mmSupply filter size: 370x360x46 mmFilter class (EN779): M5+M5Filter quantity in a set: 2 filtersProtection levelFilter protection level indicates efficiency in blocking particles or contaminants, varying by standard and application.
BasicGeneral dust and particle filtration
Pollen and moldCaptures pollen, mold spores, and other allergens
Extract filter size: 370x360x46 mmSupply filter size: 370x360x46 mmFilter class (EN779): M5+F7Filter quantity in a set: 2 filtersProtection levelFilter protection level indicates efficiency in blocking particles or contaminants, varying by standard and application.
BasicGeneral dust and particle filtration
Pollen and moldCaptures pollen, mold spores, and other allergens
Smog and bacteriaProtects against allergens and urban pollution
Extract filter size: 515x240x46 mmSupply filter size: 515x240x46 mmFilter class (EN779): M5+M5Filter quantity in a set: 2 filtersProtection levelFilter protection level indicates efficiency in blocking particles or contaminants, varying by standard and application.
BasicGeneral dust and particle filtration
Pollen and moldCaptures pollen, mold spores, and other allergens
121-135 of 176Keep your ventilation system supplied with cleaner air using a correctly sized Komfovent filter set. Our range covers original Komfovent filters and quality-tested, EU-made house brand alternatives for residential and commercial MVHR units. Shop by model, compare filter grades and choose the option that matches your unit’s specification.
Whether you need a replacement for a Domekt R 400, Domekt R 600, Domekt CF 700, Kompakt REGO or a larger Verso unit, the safest route is to match the complete model code and filter dimensions before ordering. Product listings show the set quantity, sizes and filtration class so you can buy with confidence.
Find the right Komfovent filter for your ventilation unit
Komfovent makes several ventilation-unit families, and filters that look similar are not automatically interchangeable. A Domekt filter must fit the frame and seal correctly to prevent air from bypassing the filter media. Even within the same family, the letter and control-system suffix can identify a different configuration.
Match the complete model code – not only the family name
Check the rating label on the casing, the commissioning documents or the maintenance manual. Record the full name exactly as shown. Details such as R, CF, F, H, V, C6M or C8 matter because they can indicate the heat-exchanger type, unit orientation, generation or controller. For example, a Komfovent Domekt R 450 V C6M filter should be selected against that complete designation, not simply against ‘Domekt 450’.
- Domekt R and CF models: verify the number, airflow orientation and controller suffix. Common searches include Domekt R 200 V, R 300 F C8, R 400 F/H/V, R 450 V C6M and R 600 H/V.
- Kompakt models: identify whether the unit is a REGO or RECU model and retain any number or letter suffix from the label.
- Verso models: use the full CF, R or S designation and the complete model number, particularly for larger commercial units.
- Filter size: use length x width x depth as a cross-check, but let the compatible model listing and unit documentation remain the final authority.
Browse by Komfovent model family
Use the dedicated collections to narrow a large catalogue quickly:
- Shop Komfovent Domekt filters for Domekt R, CF, S and P series units.
- Shop Komfovent Kompakt filters for compatible REGO and RECU models.
- Shop Komfovent Verso filters for Verso CF, R and S ventilation units.
Original Komfovent filters or EU-made house brand alternatives?
Both routes are designed to make routine maintenance straightforward. Original Komfovent filters are the manufacturer-branded option, produced in Lithuania to Komfovent’s specifications. They are a natural choice when you prefer original packaging or want to follow an original-equipment purchasing policy.
Our house brand Komfovent filters are made in the European Union by selected manufacturers and quality checked for compatible fit and reliable filtration. They can offer better value for regular replacement while retaining the model-specific dimensions and stated filter performance shown on the product page.
- Choose original when manufacturer branding, original specification or internal procurement rules are the priority.
- Choose house brand when you want a compatible EU-made replacement and a more economical maintenance option.
- Compare like for like by checking model compatibility, dimensions, set quantity and filter class – not price alone.
Always use the exact product specification and your unit documentation as the final check before purchase.
M5 and F7 Komfovent filter sets explained
Many Komfovent replacement sets use M5 filters, an M5 + F7 combination or another model-specific arrangement. M5 and F7 are familiar EN 779 class names; newer product information may also show ISO 16890 ratings such as ISO ePM10 or ISO ePM1. The exact percentage can vary by filter, so check the individual listing rather than assuming every M5 or F7 product is identical.
M5 / ISO ePM10 filtration
An M5-type filter is commonly used to capture larger airborne particles such as dust, pollen, mould spores and pet dander. In many two-filter MVHR systems, this grade helps protect the unit on the extract side and may also be specified for the supply side. It is a practical option where the manufacturer calls for balanced, general particulate filtration.
F7 / ISO ePM1 filtration
An F7-type supply filter is intended for finer particulate filtration and may help reduce exposure to fine dust, smog, combustion particles and smoke carried in outdoor air. This can be particularly relevant near busy roads, during pollen season or where local air quality is a concern. Because a higher-efficiency filter can create different airflow resistance, fit only a grade approved for your Komfovent model.
For a deeper comparison of older and newer classifications, read our guide to MVHR filter classes. It explains EN 779 terms alongside ISO 16890 particle groups so you can interpret product labels more easily.
How often should Komfovent filters be replaced?
As a practical starting point, inspect the filters regularly and plan replacement every 3-6 months. The best interval depends on the property, airflow setting and surrounding environment. Follow your Komfovent manual and any filter-change alert shown by the controller.
- Replace sooner near heavy traffic, construction, industry or during periods of high pollen and wildfire smoke.
- Check more often in homes with pets, indoor smoking, allergy sensitivities or high occupancy.
- Look for warning signs such as visibly loaded media, reduced airflow, persistent odours or increased fan noise.
- Do not wash disposable filters because moisture and handling can damage the media, distort the frame and reduce performance.
Delaying routine maintenance can restrict airflow and make the fans work harder. See what can happen when MVHR filters are not replaced on time for a fuller explanation of the comfort, airflow and running-cost consequences.
Keeping one correctly matched spare set on hand makes seasonal maintenance easier. Check filters before spring pollen peaks and after nearby building work, decorating or unusually smoky conditions. If a filter loads faster than expected, do not solve the problem by choosing a lower grade without checking the unit guidance. First confirm that the intake grille is clear, the filter is seated correctly and the airflow setting is appropriate. A simple replacement log – date, model, filter class and observed condition – helps you learn the right interval for the property and order the same verified set next time.
How to order the correct Komfovent replacement filter
- Find the unit label. It is normally on the casing or behind the service panel. Photograph it so the complete model code is easy to compare.
- Select the model family. Start with Domekt, Kompakt or Verso, then choose the matching series and number.
- Confirm every suffix. Check orientation and controller details such as F, H, V, C6, C6M or C8 where they appear.
- Compare the product specification. Verify extract and supply dimensions, filter class, number of filters in the set and stated compatibility.
- Ask before ordering if uncertain. Send a clear label photo and existing-filter measurements to our filter support team. We will help you identify the closest matching listing.
When the new set arrives, switch the unit off and follow the instructions under the product page’s ‘How to change’ tab. Note the airflow arrows or supply/extract positions before removing the old filters, fit the replacements without forcing the frames, close the unit securely and reset the filter timer if required.
Why buy Komfovent filters from Filter Express?
Filter Express brings compatible options together by brand, model and dimensions, reducing the time needed to find a replacement. Product pages provide the information that matters at checkout: sizes, filtration class, set quantity, protection level, manufacturer type and model compatibility.
- Original and house brand choices for different budgets and procurement preferences.
- European manufacturing across the Komfovent original and selected house brand range.
- Model-specific shopping for popular Domekt, Kompakt and Verso systems.
- Practical support when a label, suffix or filter measurement is difficult to interpret.
Ready to restore clean airflow? Choose your model above, compare the available original and house brand sets, and order the Komfovent filters that match your system. If you maintain more than one ventilation brand, you can also shop all MVHR filters in one place.
Customer Reviews
Need Help? Start Here.
We’ve gathered answers to the most common questions about our products and services. If you can’t find an answer here, please contact us directly.
What is the difference between G3, G4, M5, M6, F7 class filters? What filter class do I need?


Filter class refers to the size and quantity of airborne particles a filter can capture. In general, the higher the classification, the more effectively the filter removes fine particles such as pollen, dust, and other pollutants 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, read our guide to MVHR filter classes and how to choose the right one.
How often should I replace the filters in my MVHR?


We recommend replacing the filters every 3–6 months to ensure optimal air quality and system performance. See what can happen if filters are not replaced on time.
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.
How do I replace the filters in my MVHR? Where can I find guides and manuals?


Replacing filters is generally a simple, do-it-yourself task with no special tools required. Most of our filters come with detailed manuals or video instructions, available in the “How to change” tab on each product page. You can also browse our filter replacement guides for additional step-by-step advice. Simply find your filter and check the relevant instructions before replacing it.
How do I find the right filter for my MVHR unit?


To find the correct filter for your MVHR unit, you first need to identify the brand and model of your system. You can usually find this information on a label attached to the unit itself. Alternatively, consult the technical data in the maintenance manual.
If you’re unsure about the brand or model, there’s another way to find the right filter: remove the existing filter and measure its length, width, and height. Then, search by size in our online shop. Our filter listings include detailed specifications to help you match the right one.
If you're still not sure, feel free to contact us - send us the filter’s measurements, photos, or any other details, and we’ll be happy to help you find the right match.
What is MVHR?


MVHR stands for Mechanical Ventilation with Heat Recovery. It's a ventilation system that continuously extracts polluted, stale, or humid air and supplies fresh, filtered air into the premises. As the air flows through the system, a heat exchanger transfers warmth from the outgoing air to the incoming air - without mixing the two. This helps maintain indoor air quality while reducing heating costs and energy waste.
You can learn more about what an MVHR system is and why it is needed in our guide.
What’s the best way to maintain my MVHR system?


In between filter replacements, it’s also a good idea to clean the inside of your unit. This helps maintain not only your health but also the performance and lifespan of your heat recovery system.
You can do this yourself by removing the filters and unscrewing the front cover. This gives you access to the heat exchanger, which can be cleaned with a vacuum or a soft cloth. For more advice, browse our MVHR maintenance tips.
Can I wash my filters?


No, MVHR filters are not designed to be washed. Washing can damage the filter material, reduce its efficiency, and affect the shape, which may lead to poor fit and airflow issues. If you're looking to remove light surface dust, it's better to gently wipe the filter with a soft, dry cloth. For optimal performance, we still recommend replacing the filters regularly.
Why is filter replacement so important?


Clean filters are essential for both your health and the performance of your ventilation system. Over time, dust, bacteria, and fungi can accumulate in the filters, the system, and the air ducts. If the filters become saturated, your MVHR unit has to work harder to maintain airflow - using more energy and increasing your costs.
Dirty filters can also reduce indoor air quality by allowing harmful particles and microorganisms to recirculate, which may negatively affect your health and well-being. Learn more about how dirty MVHR filters can affect your health and well-being.
Why do my filters get dirty so quickly?


Several factors can cause your MVHR filter to become contaminated faster than expected, including both environmental conditions and the type of filter used:
- Outdoor air quality: if you live near busy roads, industrial zones, or construction sites, your system may pull in higher levels of dust and pollution. Seasonal factors can also affect how quickly filters become dirty, which is why it is especially important to replace MVHR filters in spring. In these cases, filters can become saturated in less than two months.
- Filter efficiency: higher-grade filters (such as F7 or ePM1-rated) capture finer particles, which improves air quality - but they may clog more quickly due to the higher amount of trapped pollutants.
- Filter quality: low-cost or poorly made filters (especially those from non-EU sources) may have higher pressure drops, reducing airflow efficiency and requiring more frequent replacement. They can also increase energy consumption over time.
- System airflow rate: running the MVHR system at more powerful airflow settings means a greater volume of air moves through the filters each hour, which can lead to faster filter contamination.
If you notice filters getting dirty unusually fast, it may be worth reviewing your filter class, local air conditions, or even upgrading to a multi-stage filtration setup.
Why does an MVHR system use two filters?


MVHR systems typically use two filters, some models may even include three or four - depending on the design and filtration requirements.
Usually one filter is used for extract air and one for supply air, each serving a different purpose:
- The extract filter captures dust and particles from the indoor air as it’s removed from your home. This helps protect the internal components of the MVHR unit and reduces buildup in the ventilation system.
- The supply filter cleans the outdoor air before it’s brought into your premises. This improves indoor air quality and protects your health.
Using both filters ensures that your MVHR system remains efficient while maintaining a clean and healthy indoor environment.
Can MVHR filters help with allergies?


Yes. Using higher-grade filters, such as F7 or ePM1-rated filters, can significantly reduce allergens like pollen, dust mites, and pet dander, helping support healthy indoor air for allergy sufferers. Regular replacement is key to maintaining this benefit.
What’s the difference between EN 779 and ISO 16890 filter classes?


EN 779 and ISO 16890 are two different standards for classifying air filters. While they serve the same purpose, describing how efficiently a filter removes particles from the air, they use different testing methods and naming systems.
EN 779 (now outdated) used categories like G4, M5, F7, etc. ISO 16890, which replaced it, classifies filters based on their efficiency against specific particle sizes (PM10, PM2.5, PM1). For example, a filter that used to be called F7 under EN 779 may now be labeled as ePM1 60% under ISO 16890.
We include both classifications on our product pages to help you understand ISO 16890 filter classes and find the right match for your system.
What is the difference between original and house brand products?


Original filters are made by or for the ventilation unit’s original brand, through certified production partners. They follow the brand’s specific manufacturing and packaging standards.
House brand filters, on the other hand, are made by trusted independent manufacturers who meet strict quality requirements. We work closely with our production partners and carry out our own quality control to ensure a precise fit and reliable performance. Since they’re not tied to a specific brand label, house brand filters are often more affordable - offering excellent value without compromising on quality. About Filter Express.
Are your filters compatible with smart home ventilation systems?


Yes. Most of our filters are fully compatible with modern ventilation systems, including smart and automated units. However, we always recommend checking your system’s specifications or sending us your model details to ensure a perfect fit.
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