Thermix®: China Glass with Warm Edge

Ensinger is cooperating with LiSEC and taking thermally insulating spacers for efficient insulating glass manufacture to China

The lights have turned green when it comes to energy-efficient construction products. The question of how the growing demand for low U values in windows, doors and façades can be satisfied is being demonstrated by LiSEC in Hall E1, Stand 319. For years now, the expert in machine processing of sheet glass has been cooperating in China with Ensinger, manufacturer of Thermix® Warm Edge spacers. In this way even passive house standards can be achieved easily and cost-effectively.

Increasing energy efficiency

„The advantages of thermally optimised insulating glazing are clear: Less energy escapes out of the window“, says Andreas Prechtl, Export Sales Manager for Thermix® at the German plastics specialist Ensinger, who knows what he is talking about. „With a lower heating and cooling requirement, CO2 emissions and costs also decrease. This means greater independence when it comes to energy prices, an increase in the value of the property and greater living comfort.“

Far-sighted investors and the state are therefore counting more and more on energy-efficient construction. Only in this way can the ambitious targets of the 13th five-year plan – namely of reducing the energy consumption by 15 percent by 2020 and lowering the CO2 emissions by 18 percent per GDP unit compared with 2015 – be achieved. The building sector accounts for around a third of energy consumption in China. And every year an additional one to two billion square metres are being built.

Growing with efficiency

„The requirement for insulating glass is receiving a further boost through stricter building regulations and building certification systems such as GBES, LEED or DGNB. There are also major export opportunities for manufacturers“, adds Markus Bernhuber, CEO of LiSEC Shanghai Glass Machinery. „Chinese industry’s ability to establish itself in the face of global competition through quality and innovation is something it is proving not just in the electronics and solar industry.“

A contribution to this comes from the high-precision machines for sheet glass processing and finishing from LiSEC. With these, Warm Edge spacers like Thermix® can be very easily, quickly and efficiently be bent and processed like conventional aluminium spacers. Advantage of Thermix: the Uw improves by 0.1-0.2 W/m2K because the special plastic used has a thermal conduction capacity that is over 700 times lower than aluminium.

Minimising thermal bridges

„Thermix® minimises the thermal bridge in the glass edge zone“, explains Prechtl. „The passive house-certified spacer provides, thanks to the optimised insulation, a ‚warm edge‘. With the increased surface temperature of the glass, the risk of condensation forming with fluctuating external temperature – which can lead to harm to health and buildings through mould – is reduced. In addition, the energy efficiency increases and living comfort is enhanced.“

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Serveral Thermix® spacersThermix® spacers graphic

Fig. 1 and 2: Thermix® spacers from Ensinger provide the ‚warm edge‘ in insulating glazing – passive house-certified.

Windows profile with Thermix® Warm Edge spacers

Fig. 3: Thermix® Warm Edge spacers are made from plastic with a thermal conduction capacity that is more than 700 times lower than the aluminium conventionally used. An integrated, wafer-thin stainless steel film ensures that the space between panes, usually filled with inert noble gas, remains permanently gas-tight.