HEPA With A Plenum ChamberXWGB mini-pleat HEPA filter with a plenum chamber can be connected directly to air supply ducts with no need of air supply grilles,Website: , featuring easy installation on site, low preliminary investment, reliable sealing and no leakage induced during installation.Standard size & parametersModelOverall sizeL×W×DRated Air Flow(m3/h)Initial resistance(Pa)End resistance (Pa)Efficiency （0.3μm）Dust holding(g)XWGB610.610-150H13L610×610×1501000220450≥99.95%400XWGB1220.610-150H13L1220×610×1502000800CXWGB1170.570-180H13L1170×570×1801800750