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Great filtration runs in stages. We pair a G4 pre-filter (≥90% arrestance @≥5µm, washable mesh or PET, ≤75 Pa) to shield coils and fans, an F7 bag filter (≥80% @0.4µm, 8-pocket, low-rising ΔP) to carry the 1–5µm load, and an H13 HEPA terminal (≥99.99% @MPPS, EN 1822, PU or gel-sealed) — each with test data, every HEPA scan-leak reported — into one matched train for HVAC intakes, AHU banks, GMP pharma, food lines, ORs, BSL labs and electronics cleanrooms.
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