Window Replacement: 2,300 sq ft Contemporary in Warrenville, IL

Project Details

This Warrenville homeowner was an engineer who approached the window replacement purely from an energy efficiency standpoint. After reviewing the data, he specified the highest-performing configuration available: triple-pane glass with Low-E 366 coatings and argon/krypton gas fills in Andersen 400 Series frames. The result was a measurable 42% reduction in heating costs during the following winter — well above the typical 25-35% improvement. He tracked daily energy consumption before and after to verify.