Fig 1.
Filtration efficiency measurement setup.
Diagram of filtration efficiency measurement setup, design utilizing hospital fit testing apparatus, particle generator, and house vacuum supply augmented with low-cost hardware.
Fig 2.
Filtration efficiency results.
Filtration efficiencies for (A) hospital-grade materials and (B) consumer-grade materials, with quartile data reported for materials where multiple samples were tested.
Table 1.
Filtration efficiencies and pressure drops of material combinations.
Table 2.
Measured pressure drops for single layers of tested materials.