Our company produces filter series, high quality, and full range. 1, combined high efficiency filter:Modeloutline dimension(mm)Rated air flow(m3/h)Efficiency(Sodium flame method)(%)Initial resistance(Pa)ZWGP-33SS610×610×2953300≥99.99≤220ZWGP-27SS595×595×2952700≥99.99≤220ZWGP-21SS595×595×2952100≥99.99≤220ZWGP-15SS595×595×2951500≥99.99≤220ZWGP-10SS595×595×2951000≥99.99≤2202, combined, the high ...