DOUBLE GLAZING (IG) GLASS

PRODUCT RANGE & STANDARD SIZES

U-value Table for glass as per LBNL win5

Glass size W / m²K

Monolithic 4mm 5.797

Glass 5mm 5.774

6mm 5.744

Laminated 6.38mm 5.652

Glass

Insulating 4 CFG + 6.5 AS + 4 CFG 3.211

Glass 4 CFG + 12 AS + 4 CFG 2.844

4 CFG + 6.5 AS + 4 LowE 2.525

4 CFG + 12 AS + 4 LowE 1.898

4 CFG + 6.5 AS + 6 PVB 3.168

4 CFG + 12 AS + 6 PVB 2.810

4 LowE + 6.5 AS + 6 PVB 2.498

4 LowE + 12 AS + 6 PVB 1.883

6 PVB + 6.5 AS + 6 PVB 3.123

6 PVB + 12 AS + 6 PVB 2.774

PLEASE NOTE THAT THESE U-VALUES DOES NOT INCL THE WINDOW FRAME OR THE SPACER

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 DURA SEAL

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 ALUSPACER EDGETECH SUPER SPACER

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PRODUCT SPECIFICATIONS:

EAGLE ALUMINIUM COMPATIBLE SYSTEMS

SYSTEM COMPATIBLE REMARKS

CASEMENT WINDOW 36mm YES 20mm IG Units. Keep standard sash side hung standard
900mm high.

SIDE LIGHT PATIO DOOR YES 20mm IG units.

SIDELIGHT CLIP44 YES 20mm IG units. Use 36mm Window insert.

EAGLE SLIDING DOOR NO Glazing cavity too narrow. Use Palace series.

PALACE DOOR YES 20mm IG units.

FOLDING SLIDING DOOR 500 SERIES YES 20mm IG units. Customer to ensure that the Head Rails is
secured.

FOLDING SLIDING DOOR VISTA FOLD YES 20mm IG units. Bottom Rolling system (no problem)..

HINGED DOOR YES 20mm IG units. Extra 200mm Hinge to be added.

CLIP 44 WINDOW YES 20mm IG units. Keep Sash standard side hung only 900mm
high.

CASEMENT WINDOW 30.5mm NO Glazing cavity too narrow. Use 36mm or Clip 44.

HORIZONTAL SERIES 500 S NO Glazing cavity too narrow. Use Palace Series.

HORIZONTAL SERIES 1000 S NO Glazing cavity too narrow. Use Palace Series.

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TERMS AND DEFINITIONS

Visible Light
This is made up of all colours of the rainbow, it is the light humans can see. It is also known as “white light”.

Visible Light Transmission

The percentage of visible light transmitted through the glass when the sun shines at right angles to the surface of the glass. Higher visible light transmission makes a building
look more transparent from the outside and creates a lighter interior.

Visible Light Reflection

The percentage of visible light reflected from the surface of the glass, when the sun shines at right
angles to the surface of the glass. The reflection increases as the angle of the sun decreases.

Solar Energy
Solar energy is high temperature energy radiated by the sun. It is the energy received from the sun on the surface of the earth. This includes the energy from the ultraviolet,
visible and infrared segments of the solar spectrum.

• Solar Heat Elimination

The portion of the sun’s energy stopped by the glass or glazing system. This value will change when subjected to varying environmental conditions. The environmental
conditions, which affect solar heat elimination, include air speed against both surfaces of the glass and temperature.

• Solar Energy Control

A solar control glazing system Reflects, Absorbs and Transmits (RAT) solar energy. Laminated glass contains an interlayer. Energy that would pass through clear glass is
absorbed by this interlayer. A variety of interlayer colours are available to absorb solar radiation – the darker the colour, the greater the solar control. The increased
use of glass in architecture today makes it imperative to consider the comfort of a building’s occupants and energy efficiency.

Example:
Grey Solarvue XHL RAT
Reflectance 9
Absorption 63
Direct Transmission 28
100 (RAT always = 100)

• Reflectance
The parts of the suns energy which is reflected by the glass.

• Absorption
The part of the suns energy which is absorbed into the glass.

• Direct Transmission
The part of the sun’s energy which passes directly through the glass.

• Total Energy Transmission

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 The sum of the direct energy transmission and the portion of the absorbed energy that is radiated to the interior of the glazing system. Also called Solar Heat Gain
Coefficient (SHGC).

Shading Coefficient
Shading Coefficient is a measure of the total amount of heat passing through the glazing system (known as the solar heat transmittance) compared to a single clear glass. Clear
Float Glass (CFG) has a shading coefficient of 1. Therefore, a shading coefficient of 0.50 represents a reduction of 50% of the heat that would have been transmitted when
compared to a single sheet of CFG. In other words the lower the shading coefficient, the less solar heat is allowed into the building.
How to calculate?
SC = Total Energy Transmission (TET) of the glass (87 is the total energy transmission for CFG)

U-factor (U-value)
The lower the better!! The U-factor measures how well a product prevents the conductance/transfer of heat or cold through building material. A lower U-factor means a better
insulated window or door.

Ultraviolet Light (UV)

Ultraviolet rays are found in everyday sunlight and can cause fading of paint finishes, carpets and fabrics.

Thermal Insulation
The ability to restrict the flow of heat.

Coated Glass
Glass with a chemical coating applied to one surface of the glass. The coating can provide such enhanced performance characteristics such as privacy, solar control or mirror
effects.

Coated Interlayer
Interlayer made from multiple stacks of coating also known as sputter soft coated products. The coating is encapsulated inside the interlayer.

Coated Densities
The thicker the coating, the less light is transmitted through the glass.
• High Light (HL) - 40%
• Extra High Light (XHL) - 50%
• Super High Light (SHL) - 60%
• Mega High Light (MHL) - 70%
• Ultra High Light (UHL) - 80%

Annealed Glass
To prevent or remove stresses in glass by controlled cooling. It is in fact “ordinary” glass as taken from the production line and stored in stock plates. Annealed glass, when
broken, gives large fragments with sharp edges and so is not classified as a safety glass.

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