Ventilation Guide

Soffit Panel Tools

KNOWN PANEL NFA METHOD
Use this when you know the panel NFA value and exposure.

Attic Area (sq ft):

Overhang of Soffit (inches):

Length of Soffit with Panels (ft):

NFA of known soffit panel (sq ft):

Soffit panel exposure (inches):

Required Intake NFA: sq in

Intake of Specified Panels: sq in