Portable Air Conditioning units like any are subject to dust, dirt and mould issues. Many of these systems are built at a cost and only have basic filtration components.
It is very important to keep Portable Air Con units clean and in good efficient working order. They are expensive to run and if hampered by blockages will increase uasge costs.
Due to the use mainly in domestic situations, any mould build up will effect people using them in small areas.
Hygienik has cleaned many models of Portable Air Condtioners over the years and has a good understanding on most for dissasemble, cleaning and reassemble.