As with the new architectural trends, glass can be widely used from architects, designers, glassmakers/processors, craftsmen and other professionals in a wide range of applications whether externally for windows, façades and roof glazing, or internally in floors, surface and furniture coverings, railings, partitions etc. Depending on their application, glass types and their properties vary accordingly. G. Vassiliou (THERMO GLASS) Ltd can provide a large variety of architectural and interior glass solutions as: energy efficient glass for double/triple glazing and structural applications, tinted, laminated, toughened (tempered), acoustic insulation, safety glass, anti-vandal, deco.

Even though glass creates practical possibilities by exploiting light, on the other hand energy requirements must be contented. Due to the fact that radiant infrared energy can pass through uncoated glass panes, ongoing developments in the production of improved solar and thermal performances in glass – which highly control radiation – have been developed.


Common characteristic of contemporary technologies in glazing is their ability to promote energy efficiency. With the use of a Low Emissivity glass, energy efficiency can be measured by a glazing’s U-Value and G-Value (Solar Heat Gain Coefficient).

Low-E (low emissivity) glass refers to a product where coating-metal layers dumped throughout the glass surface so that heat is reflected on the side of the glass from where it is originated. Therefore heating and cooling costs in spaces can be significantly reduced as well as costs for artificial lighting since coatings are at the same time able to transmit substantial amounts of daylight. Furthermore it provides a home protection from UV rays fading furniture.

U-Value is the indicator of the rate of transfer of heat which passes through the window. The lower the U-Value the greater will be its efficiency to resist heat flow. Our company can deliver combinations of glazing which can reach up to 1.0 [W/(m₂K)].

Solar heat gain/g-Value measures how much of solar heat is blocked. As the strength of the sun results in increased temperature in a space, a lower g- value represents less solar gain and thus makes it more suitable for warmer climates.

Further to coating used in double insulating glazing, energy efficiency can be enhanced by: the use of inner sealant that will fill the gaps between the side edges of the spacer bars that unite the glass panes offering premium elasticity and insulation; the use of a variety of spacer bars – a greater gap contributes to better acoustic performance; the insertion of an inner gas such as Argon where U-value can be significantly improved.



It transmits the maximum amount of natural light and reflects infrared radiation to minimize solar energy transmission. It has an excellent solar control and thermal insulation with high light transmission all in one coating in Neutral appearance.

High Performance

Able to minimize solar energy gain while allowing maximum visible light transmission makes it a superior energy efficiency glass solution. SunGuard High Performance Neutral offers a 60% light transmission in combination with a 40% solar factor, this provides natural daylight with good solar heat reflection, helping to keep your project cool and reduce demands on air conditioning, it also has a U value of 1.1 W/m2K providing excellent thermal insulation.


Where spaces are vulnerable to solar heat gain. Specialized in blocking heat this series is a great fit for applications where heavy sun makes excessive solar heat gain an issue.

Residential Glass

For a comfortable indoor environment when temperatures fluctuate throughout the day. With ClimaGuard low-emissivity, glass it is possible to welcome neutral light and neutralize the negative effects of sunshine and frosty temperatures.


It combines solar control and thermal insulation properties, to provide a comfortable year round environment.

During the summer:

  • Provides excellent levels of solar protection, reflecting unwanted heat by up to 56%
  • Reduces excessive heat build up compared to standard glazing
  • Has an attractive neutral appearance giving a clearer view of surroundings

During winter:

  • Provides unbeatable thermal insulation, reflecting heat back into the room and reducing heat loss more effectively than traditional low-emissivity glass products
  • 63% less heat loss compared to ordinary double-glazing
  • Increases energy efficiency by retaining more heat to the room
  • Reduces heating bills
  • Maximizes the amount of natural daylight coming into the room