| 摘要 |
A window air filtering assembly (1) for repulsive, non-entraining filtering of small particulate matter. The air filtering assembly (1) includes a selectively adjustable frame assembly (2) and a selectively adjustable filtering medium (3) attached to the frame assembly (2). The filtering medium (3) consists of fixedly-woven, microfilament strands having at least 16 % of its surface area directly open, to permit natural ventilation. |
