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    Glare protection fabrics

    Division Name:  Hunter Douglas Bulgaria


    • Web:  www.hunterdouglas.bg
    • Address: 120, James Boucher Blvd
        floor 1, office 2
        Sofia 1407
        БЪЛГАРИЯ

    • Phone Number:  + 359 2 979 03 03 / + 359 2 979 06 06
    • Fax:  + 359 2 979 10 10
    • Contact Us:  

    Division Name:  Хънтър Дъглас България


    • Address: бул. „Джеймс Баучър” 120
        етаж 1, офис 2
         гр. София 1407
        БЪЛГАРИЯ

    • Phone Number:  + 359 2 979 03 03
    • Fax:  + 359 2 979 06 06
    • Contact Us:  

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    •   Textile
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    •   150F / 600MPF
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    •   Roller Blind Fabrics
    •   Glare protection fabrics
    •   View through fabrics
    •   Thermal comfort fabrics
    •   Energy savings fabrics
    •   Black out fabrics
    •   Green fabrics
    •   Roller Blind Hardware
    •   Roller blind EOS®500
    •   Venetian Blinds
    •   Venetian Blinds

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    •   Discover All External Venetian Blinds
    •   External Venetian Blinds
    •   External Roller Blinds
    •   Proscreen | External Roller Blind
    •   Ultimate screen zip | External Roller Blind
    •   Sliding Shutters
    •   inFinity Shutters
    •   Louvre Shutters
    •   Wavy Mesh Sliding Shutters
    •   Perforated Sliding Shutters
    •   Screen Shutters
    •   Folding Shutters
    •   Perforated Folding Shutters
    •   Folding louvre Shutters
    •   Sun Louvres
    •   Open Facade Systems
    •   Canopy Systems

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    Select products below:

    •   QuadroClad® Honeycomb
    •   Make a choice
    •   QC50 QuadroClad® Honeycomb
    •   QC100 QuadroClad® Honeycomb
    •   QC200 QuadroClad® Honeycomb
    •   QC300 QuadroClad® Honeycomb
    •   QC500 QuadroClad® Honeycomb
    •   Single Skin
    •    LinearClad™ F Façade System
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    •   Open Structure
    •   84R Open Structure Façade
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    •   Customised
    •   Si-Clad™ Façade System
    •   AuraWeave™ Façade System
    •   QC Fins Façade System
    •   NBK Terracotta
    •   Terrart™ Large Façade
    •   Terrart™ Mid Façade
    •   Terrart™ Shingle Façade
    •   Terrart™ Solid Façade
    •   Terrart™ Baguette Façade

    To request pricing, please fill out the form below. A member of the Hunter Douglas Architectural team will contact you soon. Required Fields *

    Location *

    Select Country

    Select products below:

    •   Textile
    •   HeartFelt® Modular Felt Ceiling System
    •   Interior Metal
    •   Linear Closed
    •   Linear Closed Metal Ceiling 75C 150C 225C
    •   84C
    •   Linear Open
    •   BXD - Multi Panel Ceiling
    •   Concrete Core Activation
    •   84B Linear Open Ceiling
    •   84R Linear Open Ceiling
    •   70U Linear Open Ceiling
    •   Open Ceiling
    •   Cell Ceiling System
    •   Cell Ceiling Tiles
    •   Wide Panel
    •   300C/ 300L wide ceiling panels
    •   Stretch Metal
    •   Stretch Metal Tiles
    •   Planks
    •   Tiles & Planks
    •   Tiles
    •   Planks
    •   Baffles
    •   Tavola Straight
    •   Tavola Levels
    •   Tavola Divergent
    •   Sedes
    •   V100 / V200
    •   Luxalon® XLnt ceiling panels
    •   Curved Ceiling
    •   Luxalon® 300C Curved ceilings
    •   Curved 84R ceilings
    •   Curved Carrier
    •   Interior Wood
    •   Linear
    •   Solid Wood Linear Ceilings
    •    Veneered Wood Linear ceilings
    •   Metal Woodprint Interior Ceilings
    •   Grill
    •   Solid Wood Grill Ceilings
    •   Veneered Wood Grill Ceiling Panels
    •   Tiles & Panels
    •   Veneered Wood Tiles & Panels
    •   Exterior Metal
    •   Linear Closed
    •   Exterior linear closed 75C / 150C / 225C
    •   84C Exterior Linear Closed ceiling
    •   150F / 600MPF
    •   Linear Open
    •   70U linear open ceiling system
    •   The 80B/84B Linear Open Ceiling System
    •   The 84R linear open ceiling system
    •   The 185U linear open ceiling system
    •   Open Ceilings
    •   V100 screen ceiling system
    •   Wide Panel
    •   300C/ 300L exterior wide ceilings panels
    •   Exterior Wood
    •   Exterior Metal Woodprint Ceilings
    •   Solid Wood Exterior Ceiling System
    •   Veneered Wood Exterior ceilings

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    To request pricing, please fill out the form below. A member of the Hunter Douglas Architectural team will contact you soon. Required Fields *

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    Select products below:

    •   Roller Blind Fabrics
    •   Glare protection fabrics
    •   View through fabrics
    •   Thermal comfort fabrics
    •   Energy savings fabrics
    •   Black out fabrics
    •   Green fabrics
    •   Roller Blind Hardware
    •   Roller blind EOS®500
    •   Venetian Blinds
    •   Venetian Blinds

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    To request pricing, please fill out the form below. A member of the Hunter Douglas Architectural team will contact you soon. Required Fields *

    Location *

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    Select products below:

    •   Discover All External Venetian Blinds
    •   External Venetian Blinds
    •   External Roller Blinds
    •   Proscreen | External Roller Blind
    •   Ultimate screen zip | External Roller Blind
    •   Sliding Shutters
    •   inFinity Shutters
    •   Louvre Shutters
    •   Wavy Mesh Sliding Shutters
    •   Perforated Sliding Shutters
    •   Screen Shutters
    •   Folding Shutters
    •   Perforated Folding Shutters
    •   Folding louvre Shutters
    •   Sun Louvres
    •   Open Facade Systems
    •   Canopy Systems

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    To request pricing, please fill out the form below. A member of the Hunter Douglas Architectural team will contact you soon. Required Fields *

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    Select products below:

    •   QuadroClad® Honeycomb
    •   Make a choice
    •   QC50 QuadroClad® Honeycomb
    •   QC100 QuadroClad® Honeycomb
    •   QC200 QuadroClad® Honeycomb
    •   QC300 QuadroClad® Honeycomb
    •   QC500 QuadroClad® Honeycomb
    •   Single Skin
    •    LinearClad™ F Façade System
    •   LinearClad™ T-U Façade System
    •   Open Structure
    •   84R Open Structure Façade
    •   70S - 132S Open Structure Façade
    •   Customised
    •   Si-Clad™ Façade System
    •   AuraWeave™ Façade System
    •   QC Fins Façade System
    •   NBK Terracotta
    •   Terrart™ Large Façade
    •   Terrart™ Mid Façade
    •   Terrart™ Shingle Façade
    •   Terrart™ Solid Façade
    •   Terrart™ Baguette Façade

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    GLARE CONTROL FABRICS

    The prevention of glare is one of the most important functions of an internal shading solution. Clearly, glare can have a major impact on our ability to work with a computer screen in the office or read digital boards in a class room. When occupants experience glare, their ability to do their job plummets dramatically.Glare control is best achieved by roller blind fabrics having an openness of less than 5% and consist of opaque yarns or are metallised on one side. Read below why.

    Glare – A manageable annoyance

    What is glare?

    Glare can occur when the amount of light on the eye is too high or when there are contrasts in the field of view that are too extreme. Often, both situations occur simultaneously. In an office, this can easily happen when there’s direct sun on the façade. Research showed that the total amount of light at the eye (illuminance or lux-value) is the strongest predictor of glare. If this value exceeds 3000 lux, most office workers will experience severe glare.

    How to control glare

    Clearly, glare can be controlled by reducing the amount of light entering through the windows. The effectiveness of doing this depends on how much of this reduced light flow is directly transmitted and how much is diffusely transmitted. Ultimate glare control is achieved by black out fabrics. In most cases, this is not the level of control needed.

    EN 14501

    The European norm EN 14501 gives a practical framework for quantifying glare control. In EN 14501, the ability to control glare is classified on a scale of 0 to 4, where 0 indicates very little effect and 4 indicates a very good effect.

    In general, we recommend fabrics having glare control class 2 or 3. These are fabrics that have an openness of less than 5% and do not allow more than 4% of the light to pass through the yarns. These fabrics will provide adequate glare control for occupants viewing parallel to the window.


    Best fabrics to control glare


      BO XL  -  All colours
    BX Xl Fabric
      Imagine BO  -  All colours
    Imagine BO
      Screen Nature  -  Grey | Charcoal
    Imagine BO
      Screen Nature Ultimetal  -  All colours
    Imagine BO
      Panama Chrome  -  All colours
    Imagine BO
      Panama Pro 3% OF  -  Black-Pearl | Black-Grey | Black
    Screen Nature
     

    GreenScreen Eco Chrome 3% OF  -  Pewter | Charcoal

    Screen Nature
      Star 1% OF and 3% OF  -  Gold | Dusk
    Screen Nature
      Serge 1% OF and 3% OF  -  Grey-White | Grey-Sand | Grey | Grey-Black | Black
      Screen Nature


    The fish eye photographs below show the effectiveness of a screen fabric in controlling glare.


    Without Screen Fabric


    A situation of extreme glare. Vertical illuminance at the eye is 42 000 lux. It is impossible to see anything on the computer display.

    With Screen Fabric

    Glare is successfully harnessed by means of a 3% openness metallised screen. Vertical illuminance at the eye is reduced to 2600 lux. Now it is possible to read the computer display

    Luminance

    False color luminance image of the above situation. Luminance of the specular reflection at the desk on the left is approximately 80 000 cd/m2. The contrast ratio of this reflection to the computer display exceeds 400.

    Luminance

    False color luminance image of the above situation. Luminance of the specular reflection on the left is reduced to approximately 2200 cd/m2. The contrast ratio of this reflection to the computer display is reduced to about 10.

     


    EN 14501


    The European norm EN 14501 provides a very practical framework that relates direct and diffuse transmittance of screen fabrics to their ability to control glare.


    ss



    Direct transmittance occurs through the holes in the fabric and determines how much solar radiation goes directly through the screen. The well-known openness factor is a proxy for the direct transmittance.


    Diffuse transmittance is transmittance through the yarns of the fabric. The diffuse transmittance determines the brightness of the screen itself when illuminated from the outside. When too high, the screen itself may become a source of brightness and glare - as in the picture below.

     

    ss

    Example of a shading fabric with an openness factor of 1% and a diffuse transmittance of 43%.
    When directly lit by the sun, the screen becomes a bright source of light of about 7000 cd/m2, more than 20 to 30 times brighter than a computer screen.

     

    The EN 14501 glare control classes are most easily represented in a two dimensional graph of direct and diffuse transmittance. A particular fabric is represented by a point in this plane. The ability to control glare is classified on a scale of 0 to 4, where 0 indicates very little effect and 4 indicates a very good effect.



    ss



    "Good effect" is achieved by fabrics having direct transmittance less than 5% and diffuse transmittance below 2% (Glare control class 3). Only fabrics with no direct transmittance (no openness and view through) and a diffuse transmittance less than 2% achieve a glare rating of 4 – "very good effect." These are black-out or very dark dim-out fabrics. Except for presentation rooms, this is normally not the sort of light control that is needed in an office.
     

    Fabrics attaining a glare 3 rating will either have dark yarns or be metalized. Only these characteristics can guarantee less than 2% diffuse transmittance.


    View direction matters a lot. In offices and class rooms the view direction of occupants is ideally parallel to the window. If an occupant directly faces a window with the sun in the central field of view, glare protection using class 2 or 3 fabrics will generally not be adequate.


    ss



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