24H shipping Home Flat Filter G4 Iso Coarse 60% 437 x 525 mm MF/FAN G4 ISO COARSE 60% 437x525 mm zł36.89 Flat skeleton filter for recuperator and mechanical ventilation, dimensions 437x525 mm, filtration class g4, Iso Coarse efficiency 60% Economical low cost filter for basic filtration. Coarse pre-filter for air filtration in fan coil units, ventilation and recuperator unit. Add to cart