Eco Products

VariShield
Thermochromic Glass

Throughout the day, interior spaces will be exposed to the sun at different times and angles. VariShield is a smart glass that offers the solution of uneven exposure to the sun by intuitively tinting when heated by direct sunlight, hence eliminating the need for blinds, shades or curtains.

 

VariShield, which allows approximately 50% transmission of visible light on cloudy days, at night or even early in the morning, will intuitively tint in full sunlight to achieve potentially 10% or less transmission into the interiors, depending on the sunlight angle and intensity. This reduced transmission also reduces the sun's glare, heat and ultraviolet rays. This smart glass intuitively offers people a better environment to live, work & study throughout the day.

 

The laminated insulated construction provides additional heat insulation which is most effective for warm climates. As VariShield automatically dims when there is direct sunlight, it is most suited for buildings with east and west facings as well as for skylights and canopies. 

 

This smart glass will also be able to greatly contribute to Green Mark certification and achieve good ETTV.

 

The Technology

 

VariShield adopts a thermochromic approach. This means that the window use heat (thermo) to cause a “change in tint” (chromic). When not receiving heat from direct sunlight, the window will be in its natural, lightly tinted state. When receiving heat from direct sunlight, the heat will cause the window to darken.

 

The variable light transmission tinting requires only that the glass be heated by direct sunlight; there are no wires, electrodes, power supplies, or control apparatus required.  VariShield is a completely smart, sunlight-activated system.

Product Features

Energy Conservation

VariShield provides natural daylighting and allows for decreased use of electrical lighting, thus electrical demand is lowered. As VariShield is very energy efficient, it will be possible for buildings and homes to install smaller, less expensive cooling systems.

Glare Control

The warmer the glass surface gets, the darker VariShield’s tint becomes. With this variable light transmission tinting, this smart glass intuitively eliminates glare into interior spaces.

Heat Insulation

By controlling solar heat gain, VariShield lowers the amount of air conditioning loading, especially during mid-day when the heat from the sun is at its peak. 

Acoustic Barrier

VariShield laminated glass provides excellent acoustic performance. When used in an insulated glass configuration, it further enhances its sound insulation properties against external noise.

Design Versatility

VariShield allows flexibility in design possibilities with its variation of different glass types to meet the individual performance requirements.

Safety and Security

VariShield incorporates the same PVB (Polyvinyl Butyral) base material used in laminated safety glass. The PVB interlayer holds the glass in place when the glass breaks, providing enhanced safety and security for the end-user.

Ultraviolet Screening

This smart glass is able to block 99% of UV light and dramatically reduces the sunlight’s damaging effects on furnishings and fading of interior fabrics.

Daylight saving

Varishield is able to optimize light transmission, allowing sufficient light penetration into the building but still tints enough to reduce glare when there is direct sunlight. This will eliminate the use of blinds and artificial lightings. 

 

Performance comparison of VariShield products

 

Product Make-up

Light Trans. (%)

SC

SHGC

U-Value (W/m2K)

Set A: SSG A59/28

 

 

 

 

13mm Varishield Laminated 

+ 12mm Airspace

+ 6mm SSG A59/28 Low E #05 Glass

56

0.40

0.35

1.51

13mm Varishield Laminated 

+ 12mm Airspace

+ 6mm SSG A59/28 Low E #05 Glass

(Film temperature @ 25oC)

39

0.32

0.28

1.51

13mm Varishield Laminated

+ 12mm Airspace

+ 6mm SSG A59/28 Low E #05 

(Film temperature @ 65oC)

7

0.15

0.13

1.51

Set B: SSG F69/39

 

 

 

 

13mm Varishield Laminated

+ 12mm Airspace

+ 6mm SSG F69/39 Low E #05 Glass

65

0.44

0.38

1.53

13mm Varishield Laminated 

+ 12mm Airspace

+ 6mm SSG F69/39 Low E #05 Glass 

(Film temperature @ 25oC)

45

0.34

0.30

1.54

13mm Varishield Laminated 

+ 12mm Airspace

+ 6mm SSG F69/39 Low E #05 Glass 

(Film temperature @ 65oC)

8

0.17

0.15

1.54 

 

  • Airport terminals
  • Glass façades
  • Hospitals
  • Hotels
  • Office buildings
  • Private residences
  • Restaurants
  • Shopping malls
  • Skylights and sunroofs
  • Windows

 

VariShield is also available in an electric option. Get in touch with us for more information!

 

Production Sizes

 

Minimum Size (W/mm x H/mm)

300 x 300

Maximum Size (W/mm x H/mm)

1,650 x 5,700