New set of filters was first required after about one year. Delivery took place after 2 days as ordered and described. Exchange in the device without any problems. (Just note logic when removing the used filter from the device and insert a new filter in the same order again treat Used filter carefully -. They produce dust something -. And dispose with household waste After switching on the device nor the "Filter full" indicator reset, otherwise they remain lit) All in all - perfect thing!
