Nordic S4 FILTER SET (247X365X31)

Buy Nordic S4 Filter Set 247x365x31 online from filters1.eu. Premium F7+F7 replacement filters designed for Flexit Nordic S4 recuperators, ensuring superior air filtration and system performance across your home.

This complete filter set contains two high-efficiency F7 filters (ePM1 70% according to ISO 16890) that filter both incoming supply air and outgoing extract air in your Flexit Nordic S4 HRV unit. The set provides advanced protection against ultra-fine particles, making it ideal for homes requiring excellent indoor air quality, particularly in urban environments or areas with higher pollution levels.

Filter Class Comparison

• M5 filters (ePM10 55%) capture medium-sized particles down to 10 μm, providing basic protection against dust, pollen, and coarse particulates.
• F7 filters (ePM1 70%) trap ultra-fine particles as small as 0.3 μm, offering effective protection against fine dust, combustion particles, and urban air pollutants.
• Choose the F7+F7 set for maximum filtration efficiency and cleaner indoor air in demanding environments.

Product Specifications

• Compatible model: Flexit Nordic S4
• Dimensions: 247x365x31 mm
• Set contents: 2 filters (F7+F7)
• Filter class: F7 / ePM1 70% (ISO 16890)
• Country of origin: Lithuania
• Frame material: Moisture-proof double-layered laminated cardboard
• Technology: SafeLock tec, DEEP PLEAT
• Certifications: ISO 16890, EN 779:2012

Why Choose These Filters

• Precise fit guaranteed for Flexit Nordic S4 units
• Complete set with both supply and extract filters included
• High-efficiency F7 filtration for superior air quality
• Moisture-resistant construction for reliable long-term performance
• Stable airflow with minimal pressure drop
• Compliance with current European air filtration standards
• SafeLock tec ensures secure installation and operation

DEEP PLEAT Technology

DEEP PLEAT technology maximizes the filter media surface area within the compact 247x365x31 frame, delivering enhanced filtration capacity without restricting airflow through your Flexit Nordic S4 system.

• Increased filter surface area
• Consistent airflow performance
• Superior particle capture efficiency
• Extended service intervals

ECO Green Materials

These Nordic S4 filters are manufactured using ECO Green materials, combining effective filtration performance with responsible material sourcing. The moisture-proof cardboard frame provides structural integrity while supporting practical sustainability in ventilation system maintenance.

Recommended Replacement Interval

Replace your Flexit Nordic S4 filters 2 to 3 times per year, depending on local air quality conditions and system usage patterns. Regular replacement maintains optimal indoor air quality, preserves airflow efficiency, and reduces unnecessary strain on your HRV unit's fan and heat exchanger components.

Frequently Asked Questions

How often should I replace these filters?

Replace filters 2 to 3 times annually for optimal performance and air quality.

What is the difference between M5 and F7?

F7 filters trap ultra-fine particles down to 0.3 μm, while M5 filters capture medium-sized particles down to 10 μm.

Are these filters compatible with my Flexit Nordic S4?

Yes, these filters are precisely sized at 247x365x31 mm for perfect compatibility with Flexit Nordic S4 recuperators.

How many filters are included in the set?

The set includes 2 filters, covering both supply and extract air channels in your recuperator.

Are these original or compatible replacement filters?

These are high-quality compatible replacement filters that meet the same specifications and performance standards as original equipment.

For more Flexit HRV filters or to browse our complete range, visit our recuperator filters category.

Buy Nordic S4 Filter Set 247x365x31 online today. Fast EU delivery and guaranteed compatibility for your Flexit recuperator system.