3000 Series Double Hung Windows EnergyStar Partner

Introducing the 3000 Series, a replacement window that offers the features you want and the benefits you need.

Features & Benefits

Energy Savings
  • Dual-Glazed Insulating Glass with Warm-Edge Technology enhances thermal performance
  • Dual Weather-Stripping virtually eliminates air and water infiltration
  • Interlocking Sashes reduce drafts
Built to Last
  • Solid Vinyl Construction will not chip, peel or rot and never requires scraping or painting
  • Fusion-Welded Frame and Sashes offer maximum strength
  • Multi-Chambered Construction provides enhanced structural integrity
  • Fully-Welded and Weeped Sloped Sill with Rechanneling Leg ensures quick runoff of water away from window and home
Life Made Easier
  • Lifetime Warranty on Vinyl and 30-Year Warranty on Insulating Glass for peace of mind
  • Constant Force Balance System offers easy, frictionless sash movement
  • Fiberglass Half Screen is standard*
  • Extruded Lift Rails ensure easy sash operation
  • Surface Mount Lock offers peace of mind
  • Dual Night Latches offer ventilation
  • Tilt Latches make it easier to clean your windows

Energy Efficient Glass Options

Thermal Windows & Doors is proud to manufacture vinyl replacement windows and doors with the ENERGY STAR® label. Every ENERGY STAR qualified window is independently certified by the National Fenestration Ratings Council, or NFRC, to perform at or above strict levels set by the U.S. Department of Energy. The rating gives you the tools needed to compare window performance.

Peak PerformanceTM Glass

Our Peak PerformanceTM Glass system is a dual-pane insulating glass system that combines one lite of high performance Low-E Glass and one lite of clear glass for a U-value of 0.30. Enhancing the air space between the two lites with insulating Argon gas allows these windows to meet ENERGY STAR criteria. Consider the Peak Performance Eco Glass system which combines one lite of high-performance triple coat Low-E Glass and one lite of clear glass, for climates where solar control is important.

ENERGY STAR Climate Zone Map

Climate Zone map

Criteria for Windows

Climate Zone map

Vinyl Color Options*







Grid Options

Choose from a variety of decorative grid patterns, styles and colors. All grids come between the glass for easy maintenance and a clean, modern look.

Grid options include:
  • 3/8″ square
  • 5/8″ flat
  • 5/8″ contoured
contoured grid


flat grid


flat grid


Custom Shapes

Make your home your own with custom window shapes and bold architectural statements. From octagons to trapezoids, full circles to half rounds, we can build a window to fit your needs and specifications.


Full Round


Half Round







Screen Options

Full fiberglass screens* are optional with 3000 Series double hung windows.

*Screens are not meant to restrain a child from falling through an open window.

Obscure Glass Options

Choose this frosted glass option for rooms that require privacy.

Obscure Glass

Obscure Glass


energy-star-partner-80We offer a variety of high-performance, insulating glass systems that qualify our products for the ENERGY STAR label.