The presence of fine airborne particles, particularly PM1, significantly affects indoor air quality. Due to their small size, these particles can penetrate deep into the respiratory system and thus pose a health risk. In modern ventilation and air-conditioning (HVAC) systems, the use of efficient filtration solutions is therefore essential. These filters not only retain harmful particles but also maintain a low pressure drop, thereby improving the overall energy efficiency of the HVAC system. This master’s thesis analyses the performance of F9 class air filters in terms of PM1 particle retention, pressure drop, and energy efficiency. The experimental part involved a comparison of filters from three different manufacturers, with a focus on identifying the most favourable balance between filtration efficiency and airflow resistance caused by the filter. Measurements were conducted on a custom-designed test bench at various volumetric airflow rates, where filtration efficiency and pressure drop were recorded. Based on the analysis, the filter with the most favourable characteristics was selected as the basis for the development of an improved prototype. In the continuation of the research, various combinations of filtration materials and active surface areas were tested. The results demonstrated that optimizing the filter’s construction can achieve high filtration efficiency while reducing pressure drop, which positively affects the energy balance and service life of the filter.
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