The SM filter (anti-mould filter) developed by Wood`s filters dust, mould spores, pollen and other harmful particles from the air. When humidity dries out, the amount of particles in the air increases dramatically. Dust particles are absorbed by dry and electrostatically charged air much faster and in much higher numbers. nnMould growth on walls, ceilings and other surfaces causes spores to be released in dry air. Most dehumidifiers are a danger of spreading mould spores and dirt after only a short period of use. Especially when dehumidifiers are used in a mouldy environment, they become a risk factor for your health. nnThe Wood`s SMF-Filter provides a remedy! It keeps your dehumidifier clean and absolutely free of unwanted and harmful influences. The filter extends the life of your Wood`s dehumidifier, because dust and dirt particles are the most common destroyers of electrical products.nnCompatible with all DS and ED dehumidifiers from Wood`s.