SunGuard® SuperNeutral™

SN 51

Striking the perfect balance

Guardian SunGuard® SuperNeutral™ 51 (SunGuard SN 51) is a new double-silver coated solar control glass with significantly reduced internal reflection. The introduction of SunGuard SN 51 is part of Guardian’s project to optimise its SunGuard SuperNeutral (SN) family of products in terms of their aesthetics and performance. SunGuard SN 51 is a high selectivity glass product with low solar factor and a slightly more neutral appearance than its predecessor, SunGuard SN 51/28.

The outside reflection has been set to an optimized level and provides a striking and vivid appearance of the glass. For exterior glass design projects in Europe, architects are moving towards glass solutions for facades that provide a more neutral appearance, giving a sophisticated, classy touch and look to the building. SunGuard SN 51 coated glass satisfies current architectural design trends by providing a highly desirable, consistent, neutral, transparent appearance – regardless of the viewing angle, combined with high light transmission and excellent thermal insulation, making it an ideal choice for both double- and triple-glazed windows and façades. SunGuard SN 51 is available in both annealed and tempered versions.

Picture for illustration only.

Energy savings

Through thermal insulation and reduced artificial light

Low solar heat gain

While maintaining high light transmission

Available on laminated glass

For acoustics, security and comfort

Solution for matching spandrel

Ideal for curtain walls

Product Information

Glass Substrates

  • ExtraClear

Thickness

  • 4 - 12 mm

Applications

  • Facades
  • Windows
  • Doors
  • Curtain Walls
  • Roofs
  • Skylights

Manufacturing Options

  • Laminated
  • Bent
  • Heat Strengthened
  • Annealed
  • HT version with TPF foil for Heat-Treatable applications: Tempered

Available Sizes

  • Maximum Height x Width: 3210 x 6000 mm

Recommended coating positions

  • Double glazed: 2
  • Triple Glazed: 2

Edge Deletion

  • Required: Yes

Application type

  • Can be used in: Insulating Glass Unit

Visual Appearance

Use the glass visualizer to get an introductory understanding of how glass will appear in use. Use the Glass Analytics tools to explore even more options for color and performance.

Visual Appearance

Use the glass visualizer to get an introductory understanding of how glass will appear in use. Use the Glass Analytics tools to explore even more options for color and performance.

* Please see Colour Disclaimer at the bottom of the page for additional information.

Performance Data

  • Visible Light

    1. Transmittance [%] 50.7
    2. Reflectance outside [%] 13.6
    3. Reflectance inside [%] 13.3
    4. Colour Rendering Index (Ra) 91.4
  • Solar Energy

    1. Solar Factor (g) [%] 27.4
    2. Direct transmission[%] 25.4
    3. Reflectance outside [%] 37.4
    4. Absorption [%] 37.2
    5. UV [%] 14
  • Coefficients

    1. Shading Coefficient (sc) [g/0.87] 0.31
  • Thermal Properties

    1. U-Value [W/m²·K] 1.0
  • Composition

    1. Composition 6mm / 16 mm / 4 mm - Coating on surface #2
    2. Glass 1 & Coating SunGuard SN 51 on Guardian ExtraClear
    3. Glass 2 & Coating Guardian ExtraClear
    4. Gap 1 10% Air, 90% Argon
    5. Calculation Standard EN 410:2011 / EN 673:2011
  • Visible Light

    1. Transmittance [%] 45.2
    2. Reflectance outside [%] 14.9
    3. Reflectance inside [%] 16.4
    4. Colour Rendering Index (Ra) 89.5
  • Solar Energy

    1. Solar Factor (g) [%] 24.7
    2. Direct transmission[%] 20.8
    3. Reflectance outside [%] 36.2
    4. Absorption [%] 43.1
    5. UV [%] 0.1
  • Coefficients

    1. Shading Coefficient (sc) [g/0.87] 0.28
  • Thermal Properties

    1. U-Value [W/m²·K] 0.5
  • Composition

    1. Composition 6mm / 16 mm / 4 mm / 16 mm / 4 mm - Coating on surface #2 and #5
    2. Glass 1 & Coating SunGuard SN 51 on Guardian ExtraClear
    3. Glass 2 & Coating Guardian ExtraClear
    4. Glass 3 & Coating ClimaGuard Premium2 on Guardian ExtraClear
    5. Gap 1 10% Air, 90% Argon
    6. Gap 2 10% Air, 90% Argon
    7. Calculation Standard EN 410:2011 / EN 673:2011

Displayed colors are intended to represent actual color. Color is a function of light and reflectivity and cannot be accurately portrayed online. Actual glass samples should be used to determine color. Please order a sample and discuss color with your Guardian Architectural Design Manager to ensure you are pleased with your SunGuard selection before ordering glass for your project.

The thermal stress guideline is only a rough guide to the thermal safety of a glazing. Other factors such as large glass areas, shapes and patterns, thick glass, glass damaged during shipping, handling or installation, orientation of the building, exterior shading, overhangs/fins that reduce wind speed, and areas with high daily temperature fluctuations can all increase the probability of thermal breakage. The results shown are not for any specific glazing installation and do not constitute a warranty against glass breakage.