The Quantum2 Series vinyl windows, powered by Kensington Glass, keep you cooler in the summer by reflecting solar heat and warmer in winter by keeping furnace heat in the house.

Kensington Windows with Energy Star 2016With a lifetime and glass breakage warranty, the Quantum2 Series vinyl windows and patio doors are one of the most desirable energy efficient replacement vinyl windows in the industry.

Our Quantum2 Series sets the standard for replacement vinyl windows. We believe our windows are among the finest in the industry when it comes to high energy efficiency, strength, durability and style.Designed to give you a remarkable combination of looks, reliability, performance, and serious value, the Quantum2 Series vinyl windows and patio doors are the best choice when quality cannot take a backseat to cost.


  • Powered by Kensington Glass with suspended film technology to boost thermal performance
  • R-5.6 full-frame double hung windows*
  • Increases indoor comfort – warmer in the winter and cooler in the summer
  • 99.5% UV protection to reduce fading
  • Helps improve home energy efficiency
  • Reduced condensation
  • Transferable Limited Lifetime Warranty and Glass Breakage


  • Frame and sashes filled with foam to provide added insulation
  • Fusion-welded frames and sashes for air and water-tight, unitized construction
  • Elegant beveled exterior for added curb appeal
  • Easy to clean, maintenance-free vinyl surfaces
  • Dual weather stripping, reinforced interlock prevents air and water infiltration
  • Heavy-duty, extruded aluminum screen frame with fiberglass screen mesh deters holes and tears