How to Choose the Right HRV Filter for Komfovent Domekt R 400 V

✎ Admin · March 30, 2026

Choosing the right replacement filter for your Komfovent Domekt R 400 V recuperator is essential for maintaining healthy indoor air quality and system efficiency. This comprehensive guide walks you through everything you need to know about selecting compatible filters, understanding specifications, and optimizing your ventilation system's performance.

How to Choose the Right HRV Filter for Komfovent Domekt R 400 V

Understanding Your Komfovent Domekt R 400 V Ventilation System

The Komfovent Domekt R 400 V is a compact heat recovery ventilation unit designed for residential and light commercial applications. This system efficiently exchanges stale indoor air with fresh outdoor air while recovering heat, reducing energy costs significantly. However, the effectiveness of your HRV system depends heavily on using the correct filters and maintaining them properly.

Proper filter selection ensures that your Domekt R 400 V operates at peak efficiency, maintains indoor air quality, and extends the lifespan of your ventilation equipment. Choosing the wrong filter can lead to reduced airflow, increased energy consumption, and compromised air quality.

Filter Types Compatible with Komfovent Domekt R 400 V

G4 Supply Air Filters

G4 filters are the primary intake filters for the Komfovent Domekt R 400 V, capturing larger particles like dust, pollen, and debris from incoming outdoor air. These filters typically have a thickness of 45-50mm and are designed to handle moderate particle loads while maintaining acceptable pressure drop. G4 filters are ideal for standard residential environments and provide the first line of defense against outdoor pollutants. They require replacement every 6-12 months depending on air quality and usage patterns.

F7 Fine Particulate Filters

F7 filters offer enhanced filtration for the supply air stream, capturing finer particles including pollen, mold spores, and some bacterial carriers. These filters are recommended for users with allergies, asthma, or sensitivity to airborne particles. F7 filters provide superior air quality improvement but may require more frequent replacement, typically every 6-8 months. The slightly higher pressure drop necessitates ensuring your system can accommodate them without strain.

G3 Exhaust Air Filters

G3 filters are positioned on the exhaust air side of your Domekt R 400 V, protecting the heat exchanger from dust and particles generated indoors. These filters prevent contamination of the heat recovery core, ensuring optimal heat transfer efficiency. G3 filters typically last 12-24 months and are essential for maintaining system longevity and performance.

Key Specifications for Domekt R 400 V Filters

Filter Dimensions and Frame Types

The Komfovent Domekt R 400 V requires filters with specific dimensions to ensure proper fit and sealing. Standard filter sizes for this unit typically measure around 190x190mm or 200x200mm depending on the filter position. The frame type is crucial—plastic frames are standard for this model and provide excellent durability and moisture resistance. Always verify exact dimensions with your system documentation before ordering replacement filters to avoid compatibility issues.

MERV and EN ISO 16890 Ratings

Filter efficiency is measured using either MERV ratings (Minimum Efficiency Reporting Value) or EN ISO 16890 standards, which are more commonly used in Europe. G4 filters correspond to ISO ePM10 50% efficiency, while F7 filters provide ISO ePM2.5 60-80% efficiency. Understanding these ratings helps you select appropriate filtration levels for your specific air quality needs and environmental conditions.

Pressure Drop and Airflow Compatibility

Each filter type has an associated pressure drop measured in Pascals (Pa). The Domekt R 400 V is designed to accommodate filters with specific pressure drop ranges. Exceeding maximum pressure drop can overwork your system fan, increasing energy consumption and reducing lifespan. Conversely, insufficient filtration (too low pressure drop) compromises air quality. Select filters that balance filtration needs with your system's airflow capacity.

Step-by-Step Guide to Selecting Your Filter

Step 1: Assess Your Air Quality Needs

Evaluate your indoor and outdoor air quality conditions. If you live in an area with high pollution levels, allergies, or respiratory sensitivities, consider F7 filters for the supply side. Standard residential environments typically perform adequately with G4 supply filters. Pet owners and those with dust-prone environments should lean toward higher-efficiency filters.

Step 2: Check System Documentation

Locate your Komfovent Domekt R 400 V installation manual and filter specifications. This documentation provides exact filter model numbers, dimensions, and recommended replacement intervals. Your manual should clearly identify which filter cartridges fit which positions in your system. If you've misplaced the manual, contact the manufacturer or authorized dealers for accurate specifications.

Step 3: Verify Filter Dimensions

Measure your current filters or note their dimensions from documentation. The Domekt R 400 V typically uses filters sized at 190x190mm or similar compact dimensions. Verify the thickness (usually 45-50mm for G4) and ensure the frame material is compatible with plastic-framed systems. Double-check measurements before ordering to prevent compatibility problems.

Step 4: Consider Replacement Frequency

Different filter types have varying service lives. G4 filters typically last 6-12 months, F7 filters 6-8 months, and G3 exhaust filters 12-24 months. Consider how often you're willing to perform maintenance when selecting filter types. More efficient filters may require more frequent replacement, affecting long-term maintenance costs and convenience.

Step 5: Evaluate Long-Term Costs

Compare the initial cost of filters against replacement frequency and energy efficiency. Premium filters like F7 cost more initially but provide superior air quality. However, if replacement schedules are very frequent, operational costs may increase. Balance upfront expense with long-term benefits for your specific situation.

Maintenance Tips for Optimal Filter Performance

Establish Replacement Schedules

Set calendar reminders for filter replacements based on your filter type and manufacturer recommendations. Mark replacement dates on your household calendar or smartphone. Proactive replacement prevents system strain, maintains efficiency, and ensures consistent air quality throughout the year.

Monitor Pressure Indicators

If your Domekt R 400 V features pressure drop indicators or sensors, monitor them regularly. When pressure indicators signal that filters need replacement, prioritize this maintenance task. Some systems may display error codes or alert lights—these should never be ignored.

Inspect Filters During Seasonal Changes

Conduct visual inspections during spring and autumn when air quality often changes dramatically. Heavy pollen seasons or increased dust may necessitate more frequent filter changes than standard schedules suggest. Adjust replacement intervals based on actual filter condition rather than calendar dates alone.

Clean System Components

While filters themselves require replacement rather than cleaning, you can clean the surrounding system components. Gently wipe filter frames and mounting areas during replacement to remove accumulated dust. This prevents particles from bypassing new filters and maintains optimal sealing.

Where to Purchase Replacement Filters

Authorized Komfovent dealers stock genuine filters specifically designed for the Domekt R 400 V, ensuring compatibility and quality. Online suppliers specializing in ventilation filters offer competitive pricing and convenient delivery. When ordering, always provide your system model and current filter specifications to ensure correct replacement units arrive.

Buying filters from reputable suppliers guarantees genuine products that meet manufacturer specifications. Counterfeit or incorrect filters can damage your system and compromise air quality. Invest in genuine filters from trusted sources to protect your ventilation investment.

Common Mistakes to Avoid

Don't assume all filters of the same class are interchangeable—filter dimensions vary between manufacturers. Avoid neglecting exhaust side filters—they're as important as supply filters for system longevity. Never use filters beyond their recommended service life, as this reduces efficiency and strains your system. Don't ignore pressure drop ratings when upgrading to premium filters—ensure your system can handle increased resistance.

Summary and Next Steps

Selecting the right HRV filter for your Komfovent Domekt R 400 V involves understanding your system's specifications, assessing air quality needs, and committing to regular maintenance. Whether you choose standard G4 filters or premium F7 options depends on your specific circumstances and air quality priorities. By following this guide and maintaining proper replacement schedules, you'll ensure your ventilation system operates efficiently while delivering clean, healthy indoor air.

Contact filters1.eu today to find the perfect replacement filters for your Komfovent Domekt R 400 V. Our expert team can help you identify exact specifications and provide competitive pricing on genuine ventilation filters.

Recommended filters

DOMEKT R 400 V FILTER SET (450X210X46)

DOMEKT R 400 V FILTER SET (450X210X46)

K00006
model
R 400 V
Dimensions (mm)
450x210x46
The set includes:
Filters - 2 pcs.
Delivery of goods
Delivery cost is calculated at checkout based on your country.
€26.49
DOMEKT R 400 H C6M (from 2020-10) FILTER SET (417X210X46)

DOMEKT R 400 H C6M (from 2020-10) FILTER SET (417X210X46)

K00167
model
R 400 H (C6M)
Dimensions (mm)
417x210x46
The set includes:
Filters - 2 pcs.
Delivery of goods
Delivery cost is calculated at checkout based on your country.
€32.10

Frequently asked questions

What are the correct filter dimensions for Komfovent Domekt R 400 V?
The Komfovent Domekt R 400 V uses filters with dimensions of 450 × 210 × 46 mm (for IKI 2020-10 models), 428 × 231 × 46 mm (for C6M variants from 2020-10), or 417 × 210 × 46 mm (for DOMEKT R 400 H C6M models). Always verify your specific model year before ordering replacement filters.
How often should I replace the filters in my Komfovent Domekt R 400 V?
Standard replacement intervals are every 6 to 12 months, depending on environmental conditions, system usage, and filter type. In high-pollution areas or homes with pets, you may need more frequent replacement. Check your filters quarterly to determine when replacement is necessary.
What's the difference between G4 and C6M filters for my system?
G4 filters capture larger particles like dust and pollen, offering basic protection and longer service life. C6M filters provide finer filtration, capturing smaller particles including allergens and pet dander, making them ideal for better air quality. C6M is the recommended standard for modern Komfovent systems.
Can I use different filter types on supply and exhaust sides?
While technically possible, it's recommended to use matching filter types on both sides for balanced system performance. Using identical filters ensures consistent airflow and filtration efficiency throughout your ventilation system.
How do I install replacement filters in my Domekt R 400 V?
Turn off your system first, then remove old filters. Install new filters following directional arrows for proper airflow orientation. Ensure filters seat firmly without gaps, and verify proper fit before restarting your system.
Are there higher-efficiency filter options available for my Komfovent system?
F7 and higher-efficiency filters exist but require compatibility verification with your specific model. These premium options provide superior filtration for allergy sufferers but may impose greater pressure drop on your system. Consult manufacturer guidelines or specialists before upgrading.

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