EnergyCore® Fusion Insulated Window System


The EnergyCore® Fusion Insulated System combines superior vinyl framing technology with dual- or triple-pane glass, resulting in an energy-efficient window that can exceed ENERGY STAR® Version 6.0, and even the Energy Star ‘Most Efficient’ performance requirements for all climate zones.

To achieve this high level of energy efficiency, EnergyCore® windows incorporate the patented AirCell™ technology, a special coextruded PVC foam-fill that provides a fully insulated core within the vinyl frame. With this specially engineered core and tri-extruded frame profile, the system improves U-factors by 50 percent over thermally broken aluminum and 15 percent over hollow vinyl window frames.

EnergyCore®’s sash and frame components are designed to accommodate heavier, high-performance triple (1-1/8 inch) or dual (3/4 inch) insulating glass units.

SuperCapSR™ Durability

EnergyCore® windows are offered with optional patent-pending SuperCapSR™ exterior color coating designed to prevent profile distortion due to heat build-up caused by high outdoor temperatures and provide long-lasting, vibrant color.


  • Thermally superior design featuring fusion insulated AirCell™ technology
  • Exceeds current ENERGY STAR® requirements
  • Optimized insulation placement for superior thermal performance
  • Dual- and triple-glazing systems with Duralite® and Super Spacer® warm edge spacer system improve energy savings
  • 100 percent recyclable
  • Fully weldable to enhance corner strength
  • Won’t contaminate fabrication weld plates
  • Bendable for design flexibility and specialty shapes
  • Single Hung
  • Tilt Single Hung
  • Tilt Double Hung
  • Horizontal Slider
  • Double Horizontal Slider
  • Picture Window
  • Casement
  • Awning