Transformation of existing buildings&windows to be less carbon emission and low energy consumption houses,high-performance windows and glass are an indispensable part.
Traditional architectural glass products has high SHGC and poor thermal insulation effect which lead to high energy loss and uncomfortable living environment.During windows restoration, Increasing the glass thickness will not only affects its transparency and beauty, but also increases material consumption and construction cost caused by heavier loading . Especially when windows frame cannot be replaced in windows restoration, this contradiction is more prominent.
The appearance of vacuum insulating glass replaced the popular thick triple glass units and achieve better thermal performance with much less materials and costs.
What’s vacuum insulating glass?
Vacuum insulating glass refers to an sealed glass units with 0.1-0.3mm vacuum space between glass panels.With similar structure as normal insulated glass,but the VIG use 0.1-0.3mm vacuum space to replace the traditional 12mm or 16mm air space between glass panels. In order to achieve the balance of internal and external pressure of the glass,micro pillars are placed inside the VIG to avoid pressure breakage caused by the up to 10-4Pa vacuum degree.
Comparison between vacuum insulating glass & insulating glass
1. Difference in heat transfer principle
The VIG center heat transfer consist of radiation transfer and conduction of micro support pillars, gas conduction is eliminated because of the vacuum space.
The insulated glass consist of radiation transfer and gas heat transfer (including conductivity and convection).
VIG heat transfer efficiency is only 25% of normal double glass units with high performance low-E coating.
2. Difference in structure
As 0.1-0.3mm VIG space replaced traditional 12-16mm spacer,VIG thickness is only less half that of insulated glass.
Beside that,the vacuum space also bring more benefit such as increased inner glass surface temperature and avoid condensation, high soundproof performance,save more energy and create more comfortable living environment.
How vacuum glass contribute to windows restoration?
1. Vacuum glass can replace existing glass without changing original frame
Existing windows,especially buildings built before 2000s,the glass are mostly single glazing glass.Typically space designed to install glass are usually ≤9mm,which make it difficult to replace with glass thickness over 14mm.
Changing original windows frame,door frame and the connection part with wall,will cause high overall costs,including labors,materials,glass ,and also affect peoples normal life and operation who live and work in the building.
Vacuum insulating glass minimum thickness is only 6mm,customers can replace the glass without changing existing windows & doors,as well as original decoration, avoid huge restoration costs and don’t affect peoples’ normal life.
2. Vacuum insulating glass save more energy
Traditional monolithic glass,U value is always 5.8W/M2.K, even if with hard coated low-e coating,the U value is 3.8W/M2.K.
Vacuum insulating glass with low-E coating has an average U value of 0.4-0.7W/m2.k,thermal property increased by almost 10 times.
In summer,VIG block more solar energy to transfer glass and people don’t need to turn on air conditioners and in winter,VIG block the heat inside the house and decrease the heating energy.
3. Vacuum insulating glass offer more quiet living environment.
Noise is affecting people daily life and has becoming an important specifics that affect the house value.
Houses near railway,airport,and viaduct has big noise and poor soundproof glass, many windows fabricators also developed high soundproof windows to help people get rid of the bothering engineering noise,traffic noise.
Vacuum insulating glass has excellent acoustic performance,especially low and middle frequency sound,which contain most daily noise with high penetration strength.
Even the thinnest 6.3mm VIG has up to 36Dbs acoustic performance and when it comes to 12.3mm VIG, 39Dbs can be achieved to make inner house more quiet.
VIG has superior technical performance, thin thickness,simple installation and maintenance,which make it perfect of existing windows glass replacement and restoration.
Even with the 6.3mm VIG,overall windows performance is far surpass that of thermal break windows with low-E coatings,and make your windows with over 100 years history better than current popular windows systems.
HaanGlas is your turnkey VIG manufacturer in China,we manufacture,supply newest VIG production for your windows and let’s work for your windows restoration works.
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