Overview

Secondary windows—also known as interior storm windows, insulating panels, or secondary glazing systems—are a cost-effective, high-performance alternative to full window replacement for commercial buildings with old, inefficient windows. Secondary windows reduce heating and cooling energy use by up to 20 percent and cost 30 to 50 percent less than window replacement. LEARN MORE >

Overview

The most efficient pumps, HVAC and lighting solutions can still be hindered by inefficient windows, which can account for 25-50% of a commercial building’s heating and cooling load. Window replacements are an effective cost reducing solution whether as a stand alone upgrade or part of a bigger energy retrofit.