On both the “before” (unbalanced attic ventilation) and the “after” (balanced attic ventilation) test days thermo-graphic photo readings were taken during 12-hour periods on days with similar maximum outdoor temperatures and solar insolation (the radiant heat energy from the sun that heats the roof deck).
The unbalanced attic consisted of a mix of ridge vents and electric power fans without intake ventilation. The balanced attic consisted of electric power fans repositioned for maximum efficiency and Air Vent’s new Edge Vent™ – a shingle-over intake vent.
Before: Unbalanced / After: Balanced
Read more about the case study in a three-page “Executive Summary” (PDF 76k) authored by the 3rd Party RME or our one-page “quick hit” summary (PDF 1MB).