EFA (effective filtration area)
The total area of the filter media exposed to the flow of liquid or air, that is usable for filtration. This is usually designated in square centimetres (cm2), square inches (in2 ) or square feet (ft2 ).
FAQ
What is an effective filtration area (EFA)?
An effective filtration area can be defined as the total area of the filter media that is exposed to the flow of liquid or air, that is usable for filtration. This is often designated in square centimetres (cm2), square inches (in2 ) or square feet (ft2 ).