Qinghe Air Filter

Buyer Guides

Procurement guides that walk through selection criteria, efficiency-grade frameworks and what to verify before ordering.

Selection

2 guides

Selection

Selecting engine intake air filters: panel, round and heavy-duty

How to match engine intake air filters by form factor, efficiency and OE cross-reference.

Selection

Sourcing HEPA/ULPA filters and cleanroom equipment: what to verify

How to match HEPA/ULPA efficiency class, seal type and FFU sizing to cleanroom requirements.

Standards

3 guides

Standards

Filter efficiency grades: EN 1822, ISO 16890 and MERV compared

A framework-level comparison of the efficiency scales used across the catalogue — EN 1822, ISO 16890 and MERV.

Standards

HEPA vs ULPA: when the extra penetration class is worth it

How to decide between H13/H14 HEPA and U15–U17 ULPA for a cleanroom or critical environment.

Standards

Filter media selection: needle-punched, synthetic, micro-glass and carbon

Choosing the raw media type for pre-filtration, HEPA and odour-control duty.

Cleanroom

1 guide

Cleanroom

Cleanroom filtration: FFU, laminar flow and contamination control

How fan filter units, laminar-flow cabinets and pass-throughs combine into a cleanroom filtration solution.

OEM

1 guide

OEM

OEM filter procurement: from RFQ to first article

A framework-level walkthrough of sourcing filters under OEM or private-label terms.