The long life filter has a filtering efficiency of between 40 and 60%. It is capable of regenerating itself and lasting up to a maximum of 3 years in comparison to standard filters. To maintain these characteristics, the filter must be washed every 2 or 3 months with hot water and mild soap or put in the dishwasher at 65 degrees Celsius. It can then be dried in the oven for 10 minutes at 100 degrees. Suitable for Hidden models.