The project aims at the design of filters for ventilation systems with heat exchangers in the Professional Doctorate in Engineering (PDEng) programme Energy & Process Technology. This 2-year post-MSc programme contains a design project and an educational part that will be followed at the University. The design project is carried out in close cooperation with Brink Climate Systems. The educational programme will have an in-depth and broadening character with ample attention for professional development and will be partly tailored to the design project.