Filter REPL,MERV 17,HEPA
97 Percent, Includes Frame No, Number of Layers 4, Standards EPA Registered.3 micron, Filters Out Bacteria, Viruses, Filter Efficiency 99.Filter Replacement, Filter Type HEPA Final Filter; Molecular Filtration; Pre-filter, Performance Rating MERV 17, Actual Depth Not Applicable, Actual Height Not Applicable, Actual Width Not Applicable, Compatible Grainger Part Number 61DJ81, Compatible Manufacturer Model Number CPUM-500-4, Number of Filters 1, Filters Down To 0.