Design, construction and certification of a fully functional Class D cleanroom to house a laboratory for the assembly and testing of nanosatellites, which in collaboration with ESA will be launched into orbit.

The cleanroom consists of 2 rooms, a PAL/MAL and a Main Lab with a total area of 35 m2. During commissioning, the appropriate overpressures were set in the two rooms in order to comply with the GMP Annex 1 instructions for the appropriate air flow from the classified areas to the non-classified areas. During certification, the correct air supply in the 2 rooms was checked primarily in order to maintain the minimum air changes (>20ach).

During the certification, the correct air flow rates in the 2 areas were checked firstly to ensure that the minimum air changes (>20ach) were maintained. Also, the temperature and relative humidity were checked as well as the differential pressures between the 2 areas and between the airlock and the ungraded corridor. Finally, the suspended particles were measured and recorded as provided for in the ISO 14644 Part III Test Methods standard in order to define the cleanliness class of the laboratory.

According to the measurements carried out with a calibrated instrument, the laboratory was certified as Cleanroom ISO 8 At rest as the resulting measurements were ≈100 times below the maximum limit of the standard.