Air filtration using fibrous air filters is a common solution used in HVAC (Heating, Ventilation Air conditioning) systems for reducing particle matter contamination inside the building. An indoor environment with strict particle control at different levels is required by several applications. The filtration performance of air filters is a characterizing factor for its use. It includes airflow resistance, particle removal efficiency, and service life. These factors impact energy, cost, functionality, and life cycle aspects. The filtration performance of air filters can be tested on the product or the material level as flat sheet fibrous filter media. This latter approach is considered the main purpose of this study.