Compact distribution board with innovative, patent pending Air Technology. Air Technology multiplies air exchange rate by up to 14 times inside the distribution board, preventing the formation of condensation, even in harsh application conditions. The AK III is also the only distribution board with integral ventilation elements, which retain high level IP65 classification. Water, dust, dirt and other particles are prevented from penetrating the distribution box. The new distribution box is of course VDE tested and DLG certified for resistance to ammonia.