Basement Hoppers EnergyStar Partner

Features & Benefits

Energy Savings
  • Dual-Glazed Insulating Glass with Warm-Edge Technology enhances thermal performance
  • Compression Foam Exterior Seal with Interior Weather-Stripping virtually eliminates air and water infiltration
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
Life Made Easier
  • Lifetime Warranty, Lifetime Insulating Glass Warranty and Lifetime Glass Breakage Warranty for your peace of mind
  • Cam Handle Lock offers peace of mind
  • Sash Release Chain makes it easier to clean your windows
  • Flushmount Fiberglass Screen* is standard
  • Dryer vent

Energy Efficiency

The Series 5000 Window System protects your home and your wallet from rising heating and cooling bills with the Peak PerformanceTM Insulating Glass System. This advanced glass system features one lite of high performance Low-E Glass and one lite of clear glass, combined with insulating Argon gas and warm-edge technology, making your home a haven of optimum energy efficiency and comfort.

U-Factor comparison chart

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Air Infiltration

When it comes to air infiltration, less is more. The lower the CFM (cubic feet per minute), the less air the window lets pass through. This example shows how our windows compare to other windows and industry standards.

U-Factor comparison chart

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Fade Protection

Ultraviolet light inhibitors help prevent harmful UV rays from damaging and fading your furniture, drapes, carpets and hardwood floors.

U-Factor comparison chart

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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 Performance 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. The air space between the two is enhanced with Argon, an insulating gas. Consider the Peak Performance 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.

Peak PerformanceTM Ultra Glass

Peak Performance Ultra Glass combines triple glazing, Low-E Glass and Argon gas to offer a U-factor of 0.24, an insulating value that exceeds ENERGY STAR criteria.

Peak PerformanceTM Elite Glass

The addition of Krypton gas for optimal insulation gives our Peak Performance Elite Glass system an exceptional U-factor of 0.20, which far exceeds ENERGY STAR criteria and Department of Energy R-5 criteria (the lower the U-factor, the better a window insulates).

GreenSpec Listed

ENERGY STAR Climate Zone Map

Climate Zone map

Criteria for Windows

Climate Zone map

Vinyl Color Options*








Brown Laminate

Exterior/White Interior

Painted Exterior Finish Options*

Custom color match is available

American ClayAmerican Clay
Safari BrownSafari Brown
Brick RedBrick Red

Wood Grain Interior Options*

Natural Oak

Natural Oak**


Honey Oak

Honey Oak***

Caramel Oak

Caramel Oak***

Standard Features & Options

  • Obscure Glass
  • Laminated Glass
  • Acrylic Sheet provides impact resistance
  • Charcoal Aluminum Screen

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.