Nordic S2/S3 FILTER SET (272X166X48)

Buy Nordic S2/S3 Filter Set (272x166x48) online. This complete dual-filter replacement set is designed for Flexit Nordic S2 and S3 HRV units, featuring efficient F7+F7 filtration for superior indoor air quality throughout the EU.

What this product is

This filter set provides complete replacement filtration for Flexit Nordic S2 and Flexit Nordic S3 heat recovery ventilation units. The set includes two filters measuring 272x166x48 mm, designed to filter both incoming supply air and outgoing extract air. The F7+F7 configuration delivers premium filtration performance, capturing ultra-fine particles down to 0.3 μm and providing ePM1 70% efficiency according to ISO 16890 standards.

Filter class comparison

• M5 filters (ePM10 55%) capture medium-sized particles around 10 μm, including coarse dust, pollen, and larger allergens. Suitable for moderate air quality environments.
• F7 filters (ePM1 70%) capture ultra-fine particles down to 0.3 μm, including fine dust, combustion particles, bacteria, and most allergens. Recommended for urban areas, high-traffic locations, or homes requiring superior air quality.

The F7+F7 configuration offers maximum protection for both supply and extract airstreams, making it ideal for environments with elevated pollution levels or where occupants have respiratory sensitivities.

Product specifications

• Compatible models: Flexit Nordic S2, Flexit Nordic S3
• Dimensions: 272x166x48 mm
• Set contents: 2 filters (F7+F7)
• Filter class: F7 (ePM1 70% per ISO 16890)
• Country of origin: Lithuania
• Frame material: Moisture-resistant double-layered laminated cardboard
• Certifications: ISO 16890, EN 779:2012

Why choose these filters

• Precise fit for Flexit Nordic S2 and S3 units
• Complete dual-filter set for both supply and extract air
• Superior F7 filtration captures ultra-fine particles and allergens
• Maintains stable airflow throughout the filter service life
• Moisture-resistant frame construction prevents deformation
• Manufactured to ISO 16890 and EN 779:2012 standards
• Reliable performance in demanding European climates

DEEP PLEAT technology

These Nordic S2/S3 replacement filters incorporate DEEP PLEAT construction, maximizing filtration surface area within the compact 272x166x48 mm dimensions. The deep pleating design enhances particle capture efficiency while minimizing airflow resistance.

• Increased filtration surface area
• Consistent airflow resistance
• Enhanced particle capture capacity
• Extended filter service life

ECO Green materials

Our Flexit compatible filters are manufactured using ECO Green materials that balance environmental responsibility with filtration performance. The moisture-resistant cardboard frame is constructed from sustainable materials, providing structural integrity without unnecessary environmental impact. This practical approach delivers reliable HRV filtration while respecting resource efficiency.

Recommended replacement interval

Replace your Nordic S2/S3 filters 2 to 3 times per year, depending on local air quality, usage intensity, and environmental conditions. Regular replacement maintains optimal indoor air quality, protects consistent airflow performance, and reduces strain on your Flexit HRV unit, extending its operational lifespan.

Frequently Asked Questions

How often should I replace these filters?

Replace filters every 4 to 6 months, or 2 to 3 times annually, based on your local air quality and system usage.

What is the difference between M5 and F7?

M5 filters capture particles around 10 μm, while F7 filters capture ultra-fine particles down to 0.3 μm, providing superior air quality.

Are these filters compatible with my unit?

These filters are specifically designed for Flexit Nordic S2 and Nordic S3 HRV units with 272x166x48 mm filter dimensions.

How many filters are included in the set?

The set includes 2 filters, both F7 class, providing complete replacement for supply and extract airstreams.

Are these original or compatible replacement filters?

These are high-quality compatible replacement filters manufactured to meet or exceed original specifications and ISO 16890 standards.

For more compatible options, explore our complete range of Flexit HRV filters or browse our full selection of recuperator filters for other ventilation systems.

Buy Nordic S2/S3 Filter Set (272x166x48) online. Fast EU delivery for your Flexit HRV replacement filters.