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--- examples:residential_buildings:multi-family_buildings:central_europe:the_world_s_first_passive_house_darmstadt-kranichstein_germany [2020/08/17 13:05] – [Conclusion] wfeist
+++ examples:residential_buildings:multi-family_buildings:central_europe:the_world_s_first_passive_house_darmstadt-kranichstein_germany [2020/09/16 21:36] – [From the low-energy house to the Passive House] wfeist
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 |{{ :picopen:fenster_ph_groesse.png?500 }}|
-|//**__Fig. 1 - Simulation results at the beginning:__ here is a calculation of the dependen-\\ ce of the heating demand on the size of the glazed south-facing window areas in\\ a Passive House with different glazing qualities (from [[examples:residential_buildings:multi-family_buildings:central_europe:selection_of_multi-family_passive_house_buildings_in_germany#Literature|[Feist 1993] ]]). It’s clear that\\ triple-pane low-e glazing is necessary for favourable energy balances in Central \\ Europe (see [[Planning:thermal_protection:windows:Types of glazing and their specific values]]  {{:picopen:members_only.png?20|}}) (bottom curve). Dr. Ortmanns,\\ with VEGLA in Aachen at that time, helped us to obtain this glazing for the first buil-\\ ding project, the Passive House in Darmstadt-Kranichstein. Since then, this type\\ of glazing has become commonly available on the market:\\ see [[Planning:thermal_protection:windows:Types of glazing and their specific values]]  {{:picopen:members_only.png?20|}}.**//|\\
+|//**__Fig. 1 - Simulation results at the beginning:__ here is a calculation of the dependen-\\ ce of the heating demand on the size of the glazed south-facing window areas in\\ a Passive House with different glazing qualities (from [[examples:residential_buildings:multi-family_buildings:central_europe:selection_of_multi-family_passive_house_buildings_in_germany#Literature|[Feist 1993]]]). It’s clear that\\ triple-pane low-e glazing is necessary for favourable energy balances in Central \\ Europe (see [[Planning:thermal_protection:windows:Types of glazing and their specific values]]  {{:picopen:members_only.png?20|}}) (bottom curve). Dr. Ortmanns,\\ with VEGLA in Aachen at that time, helped us to obtain this glazing for the first buil-\\ ding project, the Passive House in Darmstadt-Kranichstein. Since then, this type\\ of glazing has become commonly available on the market:\\ see [[Planning:thermal_protection:windows:Types of glazing and their specific values]]  {{:picopen:members_only.png?20|}}.**//|\\
 \\
 **It was quickly realised that energy optimisation for buildings should not be limited solely to heating energy; in fact, all household energy consumption had to be minimised.** Otherwise it would be possible to reduce the heating energy requirement to "zero" by using inefficient electrical devices, for example, which create high internal gains. How high the available internal heat gains really are, was disputed even back then – with the completed Passive House, carefully measured results finally became available, namely around 2 W/m² [[examples:residential_buildings:multi-family_buildings:central_europe:selection_of_multi-family_passive_house_buildings_in_germany#Literature|[AkkP 5] ]]. In spite of this, even after standardisation, calculations are still carried out using values that are far too optimistic((This is one of the reasons of the often "bemoaned" so called performance gap, which is in fact by no way a performance gap, but a difference which results from self-deception: For example by asuming unrealistic high internal heat gains.))  (over 5 W/m²).\\