Due to the wetness of the cooled air in an air conditioning system there is always an element of risk that mould may be present.
There are no safe levels set for the occurrence of Mould. However there are IAQ Industry standards set for CFU/cm³ above which there is genuine concern for the health of inhabitants. Only a Mycologist, a Micro-biologist who is an expert in fungi & mould, can determine which moulds are harmless and which are an issue. The safest outcome is to minimise the presence of all moulds. Domestic cleaners and mould treatments are often only bleaches which may change the appearance of mould but not destroy it.
Clean-air uses a range of chemicals to eliminate mould. However the process is a time consuming one with every surface requiring multiple wet wiping to achieve success. We have taken what we have learned on Mould Remediation within HVAC systems and now apply it to more general building usage including Floors, Walls, Ceilings, Hard and Soft Furnishings. This involves drying of all materials, treatment and verification.