 back to country/language-selection
|
building types of this country  measures economy non-energetic aspects best practice disclaimer
|
| 1. Introduction | 2. Principles | 3. Advantages |
|
What is a passive house? The passive house concept comprises a building with an extremely low energy need for space heating (less than 15 kWh/m²a). That means that for instance a 100 m² apartment needs no more than the equivalent of 150 litres of oil or 150 m³ of natural gas per year (not including Domestic Hot Water). Key elements are a high thermal insulation of the building envelope (walls, windows etc.), air tightness of the envelope and heat recovery in the ventilation system. Compared to buildings fulfilling the national building codes, energy savings of 70 to 80% for space heating are achieved. But passive house is not only about energy saving – as measurements in hundreds passive houses show, both thermal comfort and air quality are much higher than in “normal” houses. Since 1991, more than 8.000 passive houses have been realized in many European countries, the majority in Germany and Austria. What does passive house retrofit (PHR) mean? In the past few years, passive house principles and components have been successfully introduced in the retrofitting of existing buildings. Depending on the building type, energy savings vary between 80 to 95%. The specific heating demand is typically reduced from values between 150 and 280 kWh/m²a to less than 30 kWh/m²a. In some cases, the passive house standard of 15 kWh/m²a is reached. As pilot projects in different countries demonstrate, these passive house retrofit (phr) are economically feasible for a range of building types. What does the passive house retrofit tool aim at? The passive house retrofit tool is an easy to use method, that helps housing companies decide which of their buildings qualify for passive house retrofit and how this can be done most economically. The tool provides general information about phr principles and advantages, about measures, costs and economic feasibility. Its main instrument is a typology, presenting energy concepts for different building types from various construction periodes. How does the passive house retrofit tool work? At the start, an overview is given of the main building typologies in the country selected. The typology selected is hypothetically renovated according to 1) the national building code and 2) by passive house retrofitting. The resulting energy demand (calculated using the Passive House Projecting Package program) and the energy savings are compared to the investment required. In the section ‘incomplete phr’, a single particular measure is not applied (e.g. heat recovery) to show the effect this measure has on the energy consumption. In addition, each measure can be studied in detail by clicking on it in the list of phr-measures. About the Europe-version of the tool The Europe-version of the web-tool is based on the Austrian version as in Austria most experience in PHR is available. The general principles, advantages are valid in great parts of Europe, building-types, climate and costs given are specific for Austria. |
"Passive house and passive house retrofit are the best retirement provision!"
"For VOGEWOS as a Social housing company, the main reasons for realizing PHR were improved comfort, the 90% energy saving, the good lettability of innovative projects and, of course, the economic feasibility of the concept . In all four ongoing projects tenants were informed early, in all projects, the tenants decision for PHR was made unanimously."
|
|
back to country/language-selection
|
building types of this country measures economy non-energetic aspects best practice
|
