If you are looking for the best of the best in the world of ventilation technology, you have come to the right place. Imagine a filter that not only captures fine dust, but even bacteria, pollen, soot, and tobacco smoke reliably. Our new F9 replacement filter for the ventilation system Stiebel-Eltron LWZ 304 / LWZ 404 more than meets this demand.

In a world where the quality of indoor air is becoming increasingly important, this filter offers high safety. Especially for people who value clean air - whether they are allergy sufferers, asthmatics, or parents of young children - this filter is almost indispensable. It carries the highest available filter class for heat recovery units in private households, guaranteeing an unparalleled filtration result.

But this filter sets standards not only in terms of filtration. The German-made MiniPleat filter medium, with its fine pleating, provides a maximum filter surface area, ensuring efficient and energy-saving operation. It's a difference you will feel - in air quality and also on your electricity bill.

Of course, our premium filter also features a stable, moisture-resistant, and mold-resistant synthetic frame. The longevity and high quality of the filter are evident from the first touch. Another quality feature is the significantly larger filter surface area compared to conventional pleated filters.

Since even the best filter doesn't last forever, we recommend replacing it every 2-3 months, depending on the air quality in your environment. This high-quality filter is designed for single use and should not be cleaned with water or chemically treated.

Do not be confused by the product image color: the actual color of the filter may vary. However, what does not vary is the consistently high quality and efficiency of this product from our SafeLuft Premium range. Order today and experience the difference a premium filter can make in your ventilation system.

What are the advantages of this very fine filter?
• The highest available filter class for heat recovery units in private households.
• Filters even fine dust, bacteria, pollen, soot, and tobacco smoke.
• Suitable for users who require high supply air quality (allergy sufferers, asthmatics, families with children...).
• Thanks to the MiniPleat filter medium with a large filter area, it has only a minimal impact on the performance or energy consumption of the device.

The main features of the Safeluft filter:
• Solid frame, moisture-resistant and mold-resistant.
• Filter medium MiniPleat with fine folding made in Germany.
• Filter area several times larger compared to pleated filters (Z-Line).
• Low pressure drop and longer lifespan.

This filter is intended for single use and cannot be rinsed with water or chemically cleaned. A replacement interval of 2-3 times per year is recommended (depending on the quality of the supply air).

Device: Stiebel-Eltron LWZ 304 / LWZ 404

Filter class: F9 | ISO ePM1 85%

Dimensions: 372x184x24 mm

Frame: Synthetic

Product line: SafeLuft Premium

SKU: SFIPUN372X184X24C

Content: 1x filter for supply air

Article number Stiebel-Eltron: 231332

Filter color: may differ from the article image

Note on product designation:

The item offered here is not an original product, but a compatible alternative product of comparable quality. All registered trademarks of device manufacturers as well as designations of original products are the property of the trademark owner. The use of these trademarks and product designations on this website is solely for the purpose of describing the alternative product and informing customers about it. We are not an authorized dealer and do not offer original spare parts from device manufacturers.