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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 [2022/01/23 15:30] – [Double low-e glazing: much better, but still not good enough] wfeistplanning: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:  optimum quality for innovative construction and modernisation ====+==== Triple glazing with two low-e layers:  optimum quality for new construction and for modernisation ====
  
 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 "comfort window", also called "Passive House window" which reduces the annual heat losses to less than the equivalent of 7 litres of heating oil per square metre – less than one eighth of the initial amount. => The result is a "comfort window", also called "Passive House window" which reduces the annual heat losses to less than the equivalent of 7 litres of heating oil per square metre – less than one eighth of the initial amount.
  
-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 is compensated for by the energy savings due to the low-e triple glazing alone.\\+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 is compensated for by the energy savings due to the low-e triple glazing alone.\\
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-The windows' potential for solar gains **just matches the thermal protection level of the insulated envelope (with U-values of about 0.15 W/(m²K)).** It is only by combining these two qualities that Passive Houses can be realised in cold climates such as typical for Central Europe. The result is a house with negligible heat losses, which stays comfortably warm and can be heated simply by using the heat present in the exhaust air.\\+The windows' potential for solar gains **just matches the thermal protection level of the insulated envelope (with U-values of about 0.15 W/(m²K)).** It is only by combining these two qualities that Passive Houses can be realised in cold climates such as typical for Central Europe - or in even colder ones, even those near to the polar circle. The result is a house with negligible heat losses, which stays comfortably warm and can be heated with a very low energy demand.\\
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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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 ===== Conclusion ===== ===== Conclusion =====
  
-Passive House windows are high quality products which are now produced and supplied by __**more than 50 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.  They not only save energy but also money, and also contribute to climate protection.  Passive House windows are a good example of efficient technology which has been developed in Europe and which creates jobs in the region, and at the same time relieves the burden on the energy market .\\+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.  They not only save energy but also money, and also contribute to climate protection.  Passive House windows are a good example of efficient technology which has been developed in Europe and which creates jobs in the region, and at the same time relieves the burden on the energy market - especially dependencies on monopolistic energy suppliers.\\
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-|{{ :picopen:glasing_passive_house.png }}| +|{{ :picopen:glasing_passive_house22..png?600 }}| 
-|//**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.**//|\\+
 \\ \\
  
planning/thermal_protection/windows/types_of_glazing_and_their_specific_values.1642948226.txt.gz · Last modified: 2022/01/23 15:30 by wfeist