What does MPPS stand for in terms of airborne particles?

MPPS stands for Most Penetrating Particulate Size. This term is widely used in the context of air filtration and particulate matter. It refers to the size of particles that are most easily able to bypass filters; typically, these particles tend to be around 0.3 micrometers in diameter.

Understanding MPPS is important for air filter design and effectiveness because it highlights a critical range of particle sizes that filters must be designed to capture. Filters may perform well outside this range but can struggle with particles at the MPPS, making this knowledge fundamental for those working in air filtration.

The other choices, although they seem plausible, do not accurately define MPPS and reflect misunderstandings about air filtration terminology.