24H shipping Home Flat Filter G4 Iso Coarse 70% 237 x 400 mm MF/FAN/FM G4 ISO COARSE 70% 237x400 mm zł35.10 Flat skeleton filter for recuperator and mechanical ventilation, dimensions 237x400 mm, filtration class g4, Iso Coarse efficiency 70% Economical low cost filter for basic filtration. Coarse pre-filter for air filtration in fan coil units, ventilation and recuperator unit. Add to cart