Attributes: LKFA [-] (node or polyline wise), LEFA [-] (element wise, horizontal and 3D models only)

For the accurate mapping of the leakage boundary conditions at nodes (or polylines) and elements with known leakage the ratio between ex- and infiltration is defined:

At nodes and polylines:

exfiltration coefficient / infiltration coefficient = LKFA, (here the exfiltration coefficient is LERA or LEKN)

In Elements:

exfiltration coefficient / infiltration coefficient = LEFA, (here the exfiltration coefficient is LEEL)