The filters for Stadler Form humidifiers are generally the same size and fit various models, including Oskar Klein. However, the dimensions of the filters vary slightly depending on the supplier, although most filters have similar dimensions. For example, the AllSpares filter measures 220x173x35 mm, while the official Stadler Form filter has slightly different dimensions. It is important to check the specific dimensions of the filter to ensure that it fits your appliance.

The replacement filters in the 2-pack and 4-pack for the Stadler Form Oskar humidifier are identical in terms of their properties and materials. Both packs contain filters that are made from plant and textile fibres and have an antibacterial treatment to keep the material hygienic. The main difference lies only in the number of filters per pack.

Used Oskar filters can be disposed in household garbage.

This is normal, but it is not a problem. According to the description, they should be changed regularly.

Reporting incorrect data is great, but you should press the "Report incorrect data" button. To do this, first press "Show more" on the product under "Specifications", and then it should have a "Report incorrect data" button at the bottom.

Hello. Yes, there are four of them. You can see for yourself by doing a quick search for the manufacturer's reference (O-050).

We change the filters about every 3 months. In spring a little more often because of pollen, in autumn/winter a little less.

Thank you for the comment, the price inconsistency has since been fixed.

Hello Horstwm, thank you for your enquiry and your confidence. The filters usually harden due to limescale deposits in the upper area, which then appears as if it has already dried out. However, as long as the water has to be refilled regularly, the filters and the unit function perfectly - the humidification performance does not decrease due to these deposits. Please do not hesitate to contact us at 041 720 48 48 or info@stadlerform.ch for further questions. Your Stadler Form Team