planning:thermal_protection:windows:types_of_glazing_and_their_specific_values
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planning:thermal_protection:windows:types_of_glazing_and_their_specific_values [2022/04/19 10:45] – [Conclusion] wfeist | planning:thermal_protection:windows:types_of_glazing_and_their_specific_values [2022/05/02 19:40] (current) – [Conclusion] wfeist | ||
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* The average interior surface temperature is now some 13°C in minimum even at frosty outdoor temperatures (-15°C). However, there is still cold air descent ocurring at the window and uncomfortable temperature stratification may still occur in the room. In Central Europe condensation only occurs on the inside on the edges with this quality of glazing .\\ | * The average interior surface temperature is now some 13°C in minimum even at frosty outdoor temperatures (-15°C). However, there is still cold air descent ocurring at the window and uncomfortable temperature stratification may still occur in the room. In Central Europe condensation only occurs on the inside on the edges with this quality of glazing .\\ | ||
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- | ==== Triple glazing with two low-e layers: | + | ==== Triple glazing with two low-e layers: |
The breakthrough for energy efficient construction in Germany was triple glazing using two low-e-layers. | The breakthrough for energy efficient construction in Germany was triple glazing using two low-e-layers. | ||
+ | |||
* It consists of two spaces between panes with one low-e coating each and inert gas filling, resulting in **U-values between 0.5 and 0.8 W/(m²K)**. | * It consists of two spaces between panes with one low-e coating each and inert gas filling, resulting in **U-values between 0.5 and 0.8 W/(m²K)**. | ||
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=> The result is a " | => The result is a " | ||
- | If one also takes into account that the (cost-free) passive solar energy entering through the Passive House window almost compensates for the heat losses in winter, the net losses through windows of this quality are negligible. Besides that, the cost of each window | + | If one also takes into account that the (cost-free) passive solar energy entering through the Passive House window almost compensates for the heat losses in winter, the net losses through windows of this quality are negligible; in a lot of climates it will be a net-energy-gain window. Besides that, the additional investment for the better quality |
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- | The windows' | + | The windows' |
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The Passive House window excels in that it not only has lower heat losses, but also provides improved comfort. ** Even with cold outdoor temperatures like -15°C, the interior surface temperature does not fall below 17°C.** | The Passive House window excels in that it not only has lower heat losses, but also provides improved comfort. ** Even with cold outdoor temperatures like -15°C, the interior surface temperature does not fall below 17°C.** | ||
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Passive House windows are high quality products which are now produced and supplied by __**more than 200 manufacturers**__. The energy savings achieved by these windows do not amount to just a few percent, in fact they amount to more than half of the heat lost through windows. | Passive House windows are high quality products which are now produced and supplied by __**more than 200 manufacturers**__. The energy savings achieved by these windows do not amount to just a few percent, in fact they amount to more than half of the heat lost through windows. | ||
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- | |{{ : | + | |{{ : |
- | |//**The development of constantly improved glazing:\\ | + | |//**The development of constantly improved glazing: from single-galzing (on the far left) to the Passive-House-suitable |
- | from single-galzing (on the far left) to the Passive-House-suitable\\ | + | glazing (far right). Only this has pleasantly warm interior surfaces even in winter. Lower energy losses and improved comfort go hand in hand.**// |
- | glazing (far right). Only this has pleasantly warm interior surfaces\\ | + | |
- | even in winter. Lower energy losses and improved comfort go\\ | + | |
- | hand in hand.**// | + | |
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planning/thermal_protection/windows/types_of_glazing_and_their_specific_values.txt · Last modified: 2022/05/02 19:40 by wfeist