On Filtration Claims
Coway markets HyperCaptive HEPA at '99.999%' efficiency — a higher headline number than SCA's 99.97% at 0.3μm. The 99.97%/0.3μm spec is the EN 1822 H13 medical-grade standard that healthcare environments actually require for documentation purposes. Headline percentages above this are typically measured against different particle sizes and aren't directly comparable to clinical procurement specs.