Toggle Nav
Search
FLEXIT NORDIC CL2 / CL3 / CL4
FLEXIT NORDIC CL2 / CL3 / CL4 Filter Sets – Original, High‑Quality Alternative and Carbon
In this category you will find original FLEXIT filter sets, carefully selected high‑quality alternative sets, and a carbon filter set for the FLEXIT NORDIC CL2, FLEXIT NORDIC CL3 and FLEXIT NORDIC CL4 ventilation units. All filters are manufactured in the correct size 288 × 234 × 48 mm to ensure:
- very good indoor air quality
- reliable and quiet operation of the unit
- energy‑efficient performance with a low pressure drop
Our alternative (non‑original) filters are produced with the same dimensions and filtration class as the originals and fit precisely into the FLEXIT unit’s filter slots (288 × 234 × 48 mm).
Compatibility
These filter sets are designed for the following FLEXIT models:
- FLEXIT NORDIC CL2
- FLEXIT NORDIC CL3
- FLEXIT NORDIC CL4
Do not mix these up with other FLEXIT NORDIC or SPIRIT models – filter sizes and sets may differ. Always check the model name on the unit’s nameplate and compare the dimensions of the existing filters (288 × 234 × 48 mm) before ordering.
Available Filter Sets
1. High‑Quality Alternative F7 / ePM1‑55% Filter Set (Recommended)
A popular, cost‑effective choice that helps keep maintenance costs low while maintaining excellent air quality.
- Contents: 2× F7 / ePM1‑55% alternative filters
- Dimensions: 288 × 234 × 48 mm
- Same filtration class as the original F7 / ePM1‑55%
- Accurate fit and comparable filtration performance
Order the high‑quality alternative set here:
FLEXIT NORDIC CL2 / CL3 / CL4 Alternative Filter Set
2. Original FLEXIT F7 Filter Set – Art. 117746
- Contents: 2× F7 / ePM1‑55% filters
- Filter size: 288 × 234 × 48 mm (art. 1023467)
- Use: efficient filtration of supply and extract air
- Best choice if you prefer to use only FLEXIT OEM spare parts
Order the original FLEXIT filter set here:
FLEXIT NORDIC CL2 / CL3 / CL4 Original Filter Set
3. Carbon Filter Set – Odour and VOC Reduction
- Contents:
- 1× carbon filter for supply air (outdoor air)
- 1× regular filter for extract air
- Dimensions (both filters): 288 × 234 × 48 mm
- Carbon filter on the supply side reduces odours and volatile organic compounds (VOCs)
- Regular extract filter protects the unit and extract ducting from contamination
Recommended for urban locations, areas with heavy traffic, nearby industry, or other odour sources.
Order the carbon filter set here:
FLEXIT NORDIC CL2 / CL3 / CL4 Carbon Filter Set
Recommended Solutions for Most Users
-
Standard residential use:
high‑quality alternative F7 / ePM1‑55% filter set (2× filters) – same protection level as the original filters, with an excellent balance between air quality, energy consumption and price. -
Areas with odour issues (traffic, restaurants, smoke, industry):
carbon filter set (1× carbon supply filter + 1× regular extract filter).
Technical Data – Original FLEXIT Filter
- Filter type: F7 / ePM1‑55%
- Filter article no.: 1023467
- Set article no.: 117746 (2 filters per set)
- Filtration efficiency: ePM1‑55% (ISO 16890)
- EN class: F7 (EN 779:2012)
- Dimensions: 288 × 234 × 48 mm
- Use: supply and/or extract air filter (depending on unit configuration)
- Compatibility: FLEXIT NORDIC CL2, CL3, CL4
Filter Installation
- Switch off the unit and follow the FLEXIT user manual.
- Remove the old filters and insert the new ones in the same positions.
- Observe airflow direction arrows (if printed on the filter) – they must point in the direction of the airflow inside the unit.
- Make sure the filter sits straight and tight, without gaps around the edges.
- Close and lock the service door properly to ensure a good seal.
Watch a video guide on how to change filters in FLEXIT NORDIC units:
Video: How to change filters – FLEXIT NORDIC (YouTube)
Filter Replacement Interval
- Typically 1–2 times per year in normal residential applications.
- Replace more frequently if:
- you live in a high‑traffic or otherwise polluted area,
- there are construction works nearby,
- your home has a lot of dust or pets.
- Replace earlier if the filters are visibly dirty or if the unit shows a filter/maintenance alarm.
FAQ – FLEXIT NORDIC CL2 / CL3 / CL4 Filters
Which filters fit the FLEXIT NORDIC CL2, CL3 and CL4 units?
- Original set: art. 117746 – 2× F7 / ePM1‑55% filters (art. 1023467), 288 × 234 × 48 mm
- High‑quality alternative set: 2× F7 / ePM1‑55% filters, same dimensions
- Carbon set: 1× carbon supply filter + 1× regular extract filter, same dimensions
Why choose the high‑quality alternative filter set?
- Same filtration class (F7 / ePM1‑55%) as the original filters.
- Correct dimensions and precise fit in the FLEXIT filter slots.
- More attractive price level with very good performance and reliability.
- Excellent choice if you want to reduce maintenance costs while keeping high indoor air quality.
When is the carbon filter set recommended?
- When you want to reduce outdoor odours (traffic, smoke, restaurants, industry).
- To improve perceived indoor air quality and reduce VOC levels.
- Particularly suitable for city apartments and houses close to busy roads.
How can I be sure I am ordering the correct filter set?
- Check the unit’s nameplate – it must state FLEXIT NORDIC CL2, CL3 or CL4.
- Measure your current filters (approx. 288 × 234 × 48 mm).
- Compare the data with the product description (original set art. 117746 / filter art. 1023467).
Using filters with the wrong size or wrong class may lead to:
- air leakage around the filters,
- reduced indoor air quality,
- higher energy consumption and fan noise,
- faster contamination of the heat exchanger and duct system.
Stock and Delivery
Original FLEXIT, high‑quality alternative and carbon filter sets for FLEXIT NORDIC CL2 / CL3 / CL4 are usually available from stock, ensuring fast dispatch and quick delivery within the EU.
