S3X TT/K3 X TT/A3 FILTER SET (255X130X48 + 255X130X20)

Buy Flexit S3X TT/K3 X TT/A3 filter set (255x130x48 + 255x130x20) online. This complete replacement filter set delivers efficient F7+F7 filtration for your Flexit ventilation unit, ensuring cleaner indoor air and reliable system performance with fast EU delivery.

This filter set is designed specifically for Flexit S3X TT, K3 X TT, and A3 recuperator models. The set includes two filters that work together to filter both incoming fresh air and outgoing exhaust air. This F7+F7 configuration provides high-efficiency filtration, capturing ultra-fine particles down to 0.3 micrometers. The filters are compatible replacement filters that match the original specifications while offering dependable performance at a competitive price point.

Filter Class Comparison

Understanding filter classes helps you choose the right set for your indoor air quality needs:

• F7 (ePM1 70%): Captures ultra-fine particles including pollen, fine dust, bacteria, and combustion particles down to 0.3 μm. Ideal for allergy sufferers and urban environments with traffic pollution.
• M5 (ePM10 55%): Captures medium-sized particles such as coarse dust and larger pollen particles down to 10 μm. Suitable for rural areas with lower air pollution levels.

This F7+F7 set provides maximum filtration efficiency for both supply and extract air streams, making it the recommended choice for most residential applications and environments where air quality is a priority.

Product Specifications

• Compatible models: Flexit S3X TT, K3 X TT, A3
• Dimensions: 255x130x48 mm + 255x130x20 mm
• Set contents: 2 filters (F7+F7 configuration)
• Filter class: F7 (ePM1 70% according to ISO 16890)
• Country of origin: Lithuania
• Frame material: Moisture-resistant double-layered cardboard
• Certifications: ISO 16890, EN 779:2012

Why Choose These Filters

• Precise fit for Flexit S3X TT, K3 X TT, and A3 recuperator models
• Complete two-filter set for full system maintenance
• F7 class filtration captures ultra-fine particles effectively
• Maintains stable airflow through your ventilation system
• Durable moisture-resistant frame construction
• Complies with ISO 16890 and EN 779:2012 standards
• Made in EU with quality control and fast delivery

DEEP PLEAT Technology

These replacement filters feature DEEP PLEAT technology, which increases the filter media surface area within the same frame dimensions. This design delivers superior filtration performance while maintaining optimal airflow through your Flexit recuperator system.

• Increased surface area for better particle capture
• Maintains stable airflow throughout service life
• Efficient dust loading capacity
• Extended filter service life

ECO Green Materials

These filters are manufactured using ECO Green materials that balance environmental responsibility with performance. The moisture-resistant cardboard frame provides durability without unnecessary plastic components, while the filter media delivers reliable filtration efficiency throughout its service life.

Recommended Replacement Interval

Replace your Flexit S3X TT/K3 X TT/A3 filters 2 to 3 times per year, depending on local air quality and system usage. Regular filter replacement maintains cleaner indoor air, protects system airflow, and reduces strain on your HRV unit. If you live in an urban area or near construction sites, consider replacing filters more frequently.

Frequently Asked Questions

How often should I replace these filters?
Replace filters 2 to 3 times per year for optimal performance and air quality.

What is the difference between F7 and M5 filters?
F7 filters capture 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 unit?
Yes, this set is designed for Flexit S3X TT, K3 X TT, and A3 recuperator models.

How many filters are included in the set?
The set includes 2 filters with dimensions 255x130x48 mm and 255x130x20 mm.

Are these original or compatible replacement filters?
These are high-quality compatible replacement filters that meet the same specifications as original filters.

Browse our complete range of Flexit HRV filters or explore all recuperator filters available for fast EU delivery.

Buy Flexit S3X TT/K3 X TT/A3 filter set (255x130x48 + 255x130x20) online. Fast EU delivery, precise compatibility, and reliable filtration performance for your ventilation system.