Replacement filter mat for Wood`s dehumidifier AD20 + AD30. Please replace filter mat annually, register device online and keep proof of purchase. Instructions for use: Slowly pull the old filter out of the recess. At best, throw the old filter immediately into an almost full rubbish bag and dispose of it immediately in the container or store it on the balcony until it is collected. After changing the filter, you can look forward to the best air quality. Caution: The filter is full of allergens. Disposing of it quickly is a top priority. Make sure that no children or animals play with it. Do not attempt to clean the filter with a vacuum cleaner. The Active Ion-Hepa filter has a much higher filtration efficiency than your vacuum cleaner. This attempt would lead to a drastic increase of allergens in your indoor air.