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</html><thumbnail_url/><thumbnail_width/><thumbnail_height/><description>Na meer dan 15 jaar VERANDERT de RICHTLIJN NEN1087 Dat ventilatie belangrijk is voor een goed binnenklimaat weten de meeste installateurs wel. Maar dat de vele ontwikkelingen leiden tot nieuwe richtlijnen en aangepaste regelgeving is menig installateur nog onbekend. Wat verandert er zoal?</description></oembed>
