K2.1 FILTER SET (130X335X50)

Buy K2.1 Filter Set (130X335X50) online. Complete replacement filter set for Flexit K2.1 recuperators with precise fit, high-performance filtration, and fast EU delivery.

What This Filter Set Is

This is a complete replacement filter set designed specifically for the Flexit K2.1 ventilation unit. The set contains two filters that work together to filter both incoming fresh air and outgoing exhaust air in your HRV system. This F7+F7 configuration provides high-efficiency filtration for homes and offices where air quality is a priority. Each filter measures 130X335X50 mm and is manufactured as a compatible replacement for original Flexit filters.

Filter Class Comparison

Understanding filter classes helps you choose the right option for your ventilation needs:

• M5 filters (ePM10 55%) capture medium-sized particles down to 10 μm, including coarse dust and pollen
• F7 filters (ePM1 70%) capture ultra-fine particles down to 0.3 μm, including fine dust, combustion particles, and some bacteria
• The F7+F7 set offers superior filtration performance compared to M5+M5 or F7+M5 combinations
• Choose F7+F7 when air quality is your primary concern or when located in urban environments with higher pollution levels

For the Flexit K2.1, we recommend the F7+F7 configuration for optimal indoor air quality protection.

Product Specifications

• Compatible model: Flexit K2.1
• Dimensions: 130X335X50 mm
• Set contents: 2 filters (F7+F7)
• Filter class: F7 (ePM1 70% according to ISO 16890)
• Country of origin: Lithuania
• Frame material: Moisture-resistant double-layered laminated cardboard
• Technology: SafeLock, DEEP PLEAT
• Certifications: ISO 16890, EN 779:2012

Why Choose These Filters

• Precise fit for Flexit K2.1 units ensures proper sealing and optimal airflow
• Complete set includes both filters needed for full system replacement
• F7 class filtration captures ultra-fine particles for cleaner indoor air
• SafeLock technology prevents filter bypass and maintains filtration efficiency
• Moisture-resistant frame construction withstands humid conditions without degrading
• Compliant with ISO 16890 and EN 779:2012 European filtration standards
• Manufactured in Lithuania with strict quality control for reliable EU market supply

DEEP PLEAT Technology

DEEP PLEAT technology maximizes the filtration surface area within the compact 130X335X50 mm frame, delivering better performance and longer service life than traditional flat filters.

• Increased surface area for particle capture
• Maintains stable airflow throughout service life
• Efficient dust holding capacity reduces loading pressure
• Extended replacement intervals save time and cost

ECO Green Materials

These Flexit K2.1 replacement filters are manufactured using ECO Green materials that balance environmental responsibility with high filtration performance. The moisture-resistant cardboard frame provides structural integrity while remaining recyclable at end of life. This practical approach to sustainability ensures you get effective air filtration without unnecessary environmental impact.

Recommended Replacement Interval

Replace your K2.1 filters 2 to 3 times per year, depending on local air quality and system usage. Regular replacement maintains optimal indoor air quality, protects consistent airflow through your HRV unit, and reduces strain on the ventilation system. Set a reminder based on your environment—more frequent changes may be needed in dusty or high-pollution areas.

Frequently Asked Questions

How often should I replace these filters?

Replace the filter set every 4 to 6 months, or 2 to 3 times per year under normal conditions.

What is the difference between M5 and F7?

F7 filters capture particles down to 0.3 μm while M5 filters stop particles down to 10 μm. F7 provides finer filtration for better air quality.

Are these filters compatible with my unit?

This set is specifically designed for the Flexit K2.1 recuperator and provides a precise fit.

How many filters are included in the set?

The set includes 2 filters (F7+F7), covering both supply and exhaust air streams in your ventilation unit.

Are these original or compatible replacement filters?

These are high-quality compatible replacement filters manufactured to meet or exceed original specifications.

More Flexit and HRV Filters

Looking for other options? Browse our complete range of Flexit HRV filters or explore our full selection of recuperator filters for all major ventilation brands available across the EU market.

Buy K2.1 Filter Set (130X335X50) online. Fast EU delivery for cleaner indoor air and reliable Flexit K2.1 performance.