Can i get Legionellas Disease?
Legionaires disease has been overblown by the media and it is not something you can contract from domestic air conditioning. The majority of cases are caused by incorrect cooling tower maintenance. Cooling towers are primarily used in commercial air conditioning to cool water cooled condensors and industry to cool recirculated water. They provide an ideal place for legionella bacteria to grow (temps between 28 to 40°C) and the operation of the towers causes drift which aerosols the bacteria allowing people to breathe it in. There’s probably more danger handling potting mix than from a cooling tower because by law all towers have to be maintained and treated with biocide.