400 Series Circle / Oval Specialty Window

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  • 400 Series Coastal Testimonial Video

    Hear what builders, homeowners and architects are saying about the performance, low maintenance and reliability of Andersen® 400 Series coastal windows with Stormwatch® protection. Learn more about 400 Series coastal windows.
  • 400 Series Quality Windows & Doors Testimonial Video

    From commitment to quality to energy efficiency, architects, builders and homeowners tell firsthand why they believe in the quality of Andersen® 400 Series windows and doors.


Andersen® 400 Series circle and oval specialty windows are stationary (non-opening) windows characterized by their special shapes. They can be used to provide singular points of light and delicate architectural accents, to create a signature statement.

  • Seven exterior colors
  • Signature design element of home
  • Natural pine or white interiors
  • Energy efficient
  • Superior PG Performance Featured Icon
  • Stormwatch Coastal Protection
  • Art Glass Featured Icon

Shape Options

Andersen® 400 Series specialty circle and oval windows are available in circles and ovals
  • Oval Window Shape

  • Circle Window Shape

Glass Options

Glass can affect energy efficiency more than any other part of a window or patio door—and not all glass performs the same.  Andersen offers one of the industry’s widest arrays of glass options, enabling you to find the right choice for your climate and your home.  


Our Andersen 400 Series includes the following glass options:

  • Low-E4® Glass
    Outstanding overall thermal performance for climates where both heating and cooling costs are a concern. Standard.
  • Low-E4® SmartSun Glass
    Superior solar control glass that offers high visibility.
  • Low-E4® Sun Glass
    Outstanding thermal performance in southern climates where less solar heat gain is desired.

Strength Options

Tempered glass is available on all 400 Series windows. All Low-E4® glass options are available with laminated, impact-resistant glass. Other glass options are also available; see your Andersen® dealer for details.
  • Low-E4® Impact-Resistant Glass

    Satisfies coastal wind-borne debris code requirements, lowers sound transmission, resists forced entry and is energy-efficient. Tempered also available.

  • Low-E4® SmartSun™ Impact-Resistant Glass

    Offers the structural and safety benefits of Low-E4® Impact-Resistant Glass while reducing heat transfer and greatly reduces UV rays. Tempered also available.

  • Low-E4® Sun Impact-Resistant Glass
    Tinted to reduce heat gain from intense sunlight while offering the safety of Low-E4® Impact-Resistant Glass. Tempered also available.
  • Tempered Glass
    Stronger than Low-E glass. Available for 400 Series windows.

Art Glass

Andersen has three art glass series. Frank Lloyd Wright® Series patterns are inspired by the renowned architect, offering simplicity, unity and nature. Classic Series represents major architectural design themes from the late 1800s through the 1930s, as well as Southwestern-inspired design. Artisan Series offers two designs influenced by 20th Century American and European architectural schools featuring striking visual patterns that evoke an extraordinary blend of art and nature.
  • Eucalyptus Frank Lloyd Wright Art Glass
    Frank Lloyd Wright Series - Eucalyptus

  • Wichita Frank Lloyd Wright Art Glass
    Frank Lloyd Wright Series - Wichita

  • Colonnade Frank Lloyd Wright Art Glass
    Frank Lloyd Wright Series - Colonnade

  • Prairie Rhythm Frank Lloyd Wright Art Glass
    Frank Lloyd Wright Series - Prairie Rhythm

  • Diamond Lights Classic Art Glass
    Classic Series - Diamond Lights

  • Lotus Classic Art Glass
    Classic Series - Lotus

  • Regency Classic Art Glass
    Classic Series - Regency

  • Victoria Classic Art Glass
    Classic Series - Victoria

  • Harmonics Artisan Art Glass
    Artisan Series - Harmonics

  • Affinity Artisan Art Glass
    Artisan Series - Affinity

  • Taos Classic Art Glass
    Classic Series - Taos


Patterned glass lets in light while obscuring vision and adds a unique decorative touch to your home.
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Grille Patterns

Window grilles offer an extra design touch to enhance any architectural style or express the taste of any homeowner. Andersen® 400 Series windows and patio doors offer a variety of grille types and grille patterns, making it easy to fit both your style and your home’s. For a signature look, we’ll work with you to create custom grille designs.

A sample of our patterns for casement windows is shown below. Many more are available. Patterns for other windows or patio doors may differ, depending on product type and size. For details, see your Andersen dealer.

  • Colonial Grille Pattern
  • Renaissance Grille Pattern
  • Specified Equal Light Grille Pattern
    Specified Equal Light
  • Custom Grille Patterns Available

Grille Configurations

  • Perm Ext & Perm Int w/ Spacer Grille Configurations
    Full Divided Light
    Give your window an authentic look with full divided light grilles that are permanently applied to the interior and exterior of your window with a spacer between the glass.
  • Removable Int w/ Perm Ext Grille Configurations Perm Ext & Perm Int Grille Configurations
    Simulated Divided Light
    Simulated divided light offers permanent grilles on the exterior and interior with no spacer between the glass. We also offer permanent exterior grilles with removable interior grilles, available in natural wood or prefinished white.
  • Removable Interior Grille Configurations Finelight (between-the-glass) Grille Configurations
    Convenient Cleaning Options
    Removable interior grilles come off for easy cleaning. Andersen® Finelight™ grilles are installed between the glass panes and feature a contoured 1-inch or ¾-inch profile.

Grille Widths

Grilles for Andersen® 400 Series windows and doors are available in a variety of widths to help you achieve any architectural style with authenticity.
  • Three Quarter Inch Grille Width Profile
  • Three Quarters Inch Finelight Grille Width Profile
    3/4" (Finelight Only)
  • Seven Eighths Inch Grille Width Profile
  • One Inch Finelight Grille Width Profile
    1" (Finelight Only)
  • One and One Eighth Inch Grille Width Profile


  • Colonial Interior Arch Casing 2.5 - 400 S Oval/Circle
    Interior Arch Casing

    Interior arch casing is available in colonial or ranch styles.

  • Plinth blocks - 400 S Oval/Circle/Arch
    Plinth Blocks

    Plinth blocks enhance casing transitions.

  • Direct Set Glass for A-Series and 400 Series Complementary Windows
    Direct Set Glass

    Direct set glass allows for more compatibility in window combinations, creating perfect alignment with a range of window types.


Andersen® 400 Series products have been tested to extremes, going from temperatures duplicating the cold of Alaska winters to the heat of Death Valley summers, three times a day, day after day. They came through it all beautifully.
  • Coastal Upgrade

    Stormwatch® structural enhancements meet most coastal U.S. building code requirements, improve energy efficiency, and resist wear from salt water and storms.

    Learn more about Coastal Performance

    Control your heating and cooling costs by choosing the best type of glass for your climate and performance needs.

    Find the ENERGY STAR® Product Performance Rating
  • NFRC Ratings
    Use National Fenestration Rating Council (NFRC) ratings to quickly compare window and door energy efficiency.
    Learn more about NFRC Ratings
  • Performance Grade
    Performance Grade (PG) represents a window or door's resistance to infiltration by wind, water or forced entry. This measurement replaces Design Pressure (DP) ratings.
    Learn more about PG Ratings


Andersen offers detailed instruction guides to aid in the installation process. Installation services are provided by independent companies and are not endorsed by Andersen.
Installation Guide
Installation Guide - Standard Product
Accessory Guide - Standard Product
Joining Guide - Standard Product
Service Guide - Standard Product
Products with Stormwatch® Protection


The Andersen Owner-2-Owner® Limited Warranty transfers from each owner to the next, providing full benefits on glass for 20 years and on non-glass components for 10 years.

Technical Documents

Click the menu to the left to browse all technical information for this product by topic.
To get technical documents for other Andersen® products, visit our Technical Documents Library.
Accessory Guide
Accessory Guide - Standard Product
Products with Stormwatch® Protection
Joining Guide
Joining Guide - Standard Product