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Glass Solar control

Solar control glass is used in order to create the most comfortable interiors, significantly reducing the greenhouse effect. This leads to a reduction in the size of the air conditioning systems, and implicitly reduces the costs for cooling the rooms. Depending on the degree of sunlight, the orientation and the surface to be glazed, the user will choose the best compromise between light transmission (LT) and heat that enters the room (solar factor g).

Most
comfortable
interiors, significantly reducing the greenhouse effect

Glazing range

The solar control glass range comprises a variety of types of glass with different degrees of solar protection and different colors.
The glasses used are shown in the table below.

Name

Color

Thickness

Lt[%]

Sun Guard Neutral 67

Neutral Grey

6 mm

67

Sun Guard Blue 52

Blue

6 mm

52

Green

6 mm

54

Sun Guard Green 54

Sun Guard Grey 32

Grey

6 mm

32

Stopsol Classic Grey

Grey

4 mm

17

Stopsol Classic Bronze

Bronze

4 mm

19

Architects and designers usually choose glasses that provide a high light transmission but also provide a high solar protection.
The new techniques allow the obtaining of a high-performance glass with a ratio between light transmission and solar factor close to 2
(maximum ratio which is physically possible).

Solar protection efficiency

Solar factor

Light transmission (TL)

Thermal insulation (Ug)

Metal oxide layer

Advantages

Energy saving
Reducing the use of air
conditioning

Versatility
In combination with other types of glass it can become a multifunctional glass with thermal insulation properties, soundproof insulation
properties or providing
protection against burglars

Brighter interior
The light transmission
feature, associated with powerful sunscreen
properties (HS glass)

Sunscreen
Attenuation of the dazzling
effect of the sun

Neutral appearance
On a clear support it
preserves its neutral
appearance and the
light reflectivity is close to that of an ordinary double glazing window

DATA SHEET

Area
Covered

Description

Thickness

Ug [W/m2K]

Lt[%]

g[%]

Rw[dB]

SG-S-6-NEUTRAL 67/14ar/4:

3

24 mm

1.1

59

47

33

SG-S-6-GREEN 54/14ar/4:

3

24 mm

1.1

48

29

33

SG-S-6-BLUE 52/14ar/4:

3

24 mm

1.1

45

36

33

SG-S-6-GREY 32/14ar/4:

3

24 mm

1.1

28

23

33

The solar factor g (%) is the fraction of incident solar radiation that enters a room and is sent by the glass (transmission + energy re-emission of the glass into the room). This is one of the essential characteristics of the solar control coated glass. A higher value indicates a lower solar protection.

The light transmission coefficient LT (%) is the percentage of light flux transmitted directly through the glass. A low value indicates a dark
glass and consequently a less bright room.

How does it work?

Direct Transmission

Solar flux

Reflection

Absorbtion

Exterior Re-Radiation

Interior Re-Radiation

As it is well known, outside the visible component, the solar radiation also includes infrared spectrum radiation (below the visible limit) and ultraviolet radiation (over the visible limit) that can not be detected by the human eye. However, this radiation transmits a large amount of heat. The technological innovations in recent years led to the manufacture of a new type of glass capable of reflecting heat, but allowing the light to pass.
The figure from the right side shows how an incident solar beam, on a glass surface, is divided into three parts: reflection, absorption and transmission.
The solar control is achieved by changing the ratio of these three components, whether it is the radiation in the visible or invisible spectrum.

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