What’s the best U value of insulated glass?
Insulated glass is widely used in curtain wall,glass wall ,high rise buildings.The most common glass combination is 6-12A-6 with double silver low-E,U value is around 1.6w/m2.k.
Double silver low-E has the highest cost performance.reference price for typical insulated glass :
single silver low-E IGU- USD22.5/SQM,
double silver low-E- USD26.5/SQM,
triple silver low-E- USD45/SQM.
While passive building is becoming more and more popular in European countries,the passive building windows&doors U value is usually below 0.8w/m2.k and even sometimes below 0.6W/m2.k.
Then how we can decrease the glass U value to achieve the passive building low U value requirement?
c.reasonable aluminium spacer.
Here is a comparison of different IGU U value:
| Glass combination | U value-EN673 |
| 6 Clear +12A+6 Clear | 2.7 |
| 6 SGG-COOLLITE SKN176+12A+6 Clear | 1.39 |
| 6 SGG-COOLLITE SKN176+12Ar+6 Clear | 1.15 |
| 6 SGG-COOLLITE SKN176+16Ar+6 SGG-COOLLITE SKN176 | 1.12 |
| 6 SGG-COOLLITE SKN176+12Ar+6 SGG-COOLLITE SKN176+12Ar+6 Clear | 0.68 |
| 6 SGG-COOLLITE SKN176+16Ar+6 SGG-COOLLITE SKN176+16Ar+6 Clear | 0.56 |
As we can see with more low-E coatings and glass overall thickness,as well as Argon ,U value of triple glazed units can achieve 0.56W/m2.k.
PASSIVE-WINDOWS-WITH-TRIPLE-GLAZED-IGU
In combination with our WR93 Passive windows system,overall windows U value is as below:
| Glass combination | U value-EN673 |
| WR93 with 6 SGG-COOLLITE SKN176+16Ar+6 SGG-COOLLITE SKN176 | 1.26 |
| WR93 with 6 SGG-COOLLITE SKN176+12Ar+6 SGG-COOLLITE SKN176+12Ar+6 Clear | 0.89 |
| WR93 with 6 SGG-COOLLITE SKN176+16Ar+6 SGG-COOLLITE SKN176+16Ar+6 Clear | 0.65 |
The excellent thermal insulation performance makes the whole windows energy efficient.
Morn is your turnkey passive windows & extremely energy efficient glass supplier,welcome contact us for more info.
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