2.outer frame: PP
3.filter material: Superfine glass fiber filter paper boards or foil/partition

use: Clean room, commercial and industrial ventilation and air conditioning system of the filter high humidity ventilation and air conditioning ventilation system, vav ventilation and air conditioning system installation space tension ventilation and air conditioning systemouter frame: PPfilter material: Superfine glass fiber filter paper boards or foil/partitionsealant: PU

     5.  efficiency:  F6 (EN779): Counting the average efficiency60-80%

               F7 (EN779): Counting the average efficiency80-90%

          F8 (EN779): Counting the average efficiency90-95%

            F9 (EN779): Counting the average efficiency>=95%

            H10(EN1822): >=85%@MPPS(>=90%@0.3um)

     6.continuous operating temperature:<=70

     7.suggest biggest end resistance:<=600pa