290 x 594mm High Efficiency Cardboard Filter (F6)

The 290 x 594mm High Efficiency Cardboard Filter (F6) is an F6-grade high efficiency pleated filter with a rigid cardboard frame, used where finer filtration is needed than a standard G4 panel filter provides. Fits into a standard panel filter housing as a medium-efficiency pre-filter, giving cleaner supply air and helping to protect finer filters or coils downstream.