The FH line, in its filter version, features high-efficiency air supply units with built-in filters for outdoor air intake. The G4/F8 class filters meet the requirements of standard NBR 16401-3, delivering excellent filtration quality. With an ultra-compact design and extremely low profile, the FH air supply unit is ideal for spaces with limited room. Its reinforced sheet metal construction and special sealing on joints and access covers ensure durability and easy maintenance. Operating in temperatures from -40°C to +65°C, it is the perfect solution for demanding and efficient ventilation systems.