The 7 Best H13 HEPA Air Purifiers in 2020 (medical-grade) 2020-06-07 · The H13 HEPA filter is a medical-grade air filter capable of removing a minimum of 99.95% particles at MPPS (0.21 microns). This is unlike the lower-grade HEPA filters (H10 to H12), which traps 85% to 99.5% of contaminants of 0.3 microns of size in the […]

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