The Content Of The Article: A low-energy house is used in new buildings and renovated old buildings, if the required energy requirements are exceeded. The most important on a way to the low-energy house is the minimization of heat loss. In Germany, the Energy Saving Regulation has been in force since 1 February 2002 / amended in November 2004. The Energy Saving Ordinance limits the dependence on the degree of compactness (A / V ratio) on the specific transmission heat loss of a building and the primary requirements.
A low-energy house in Switzerland is a house built according to the Mineregiestandard (protected brand for sustainable construction). The low-energy houses are divided into different classes in South Tyrol. This is referred to as a climate house A, B or C. The country has awarded a plaque to the climate standard it has attained. Since 2005, the climate house "C" has been set as the minimum standard for new buildings.
Northern Germany has strict requirements for the term low-energy house. The most common type is the "Low Energy House Standard Schleswig Holstein". According to the German Energy Saving Ordinance (EnEV), the maximum permissible primary energy requirement must be at least 20% and the maximum permissible specific transmission loss at least 30% below. (Primary energy is energy available with naturally occurring forms or carriers of energy, such as fossil energy (hard coal, peat, lignite), wind energy, hydropower, solar energy, etc.).This can be achieved by effectively insulating all exterior parts and minimizing thermal bridges. There should be a heat-insulating layer around the house that does not penetrate materials with lambda values of 0.22W / mK
become. These houses need to be secure
the air hygiene be equipped with a mechanical ventilation and ventilation systems with heat recovery. A certificate is awarded by the consortium for contemporary construction e.V. (ARGE).
All floor plans and house types are possible. From the chic one-two-family house to the city villa. Individuality in the room layout and external design. Low-energy houses can be purchased from approx. 130,000 euros depending on their size and features. These are available both as a development house and turnkey. By own contribution can also be saved considerably here. As the term low-energy house is not defined by law, banks require a heat demand certificate for mortgage financing. For low-interest construction loans for low-energy houses, certain limits are set according to the type of credit.
If you want to rehabilitate an old building to the effect, here is aggravating that, for example, a sufficient insulation of the floor slab or the massive expansion of attics are not possible. Here qualitative cost-effective solutions must be found. Heating and ventilation strategies that ensure adequate air exchange and heat recovery must be developed. In many cases, a thermal bridge-free insulation of the roof truss and the walls is easy to carry out. In many old buildings, however, the lower part of the building forms a sore spot. Thick insulation panels reduce the ceiling height, lintels must be shortened. However, if the flanks are insulated, this will cause the temperature in the soil to increase over the course of a few years and thus reduce the heat loss of the base plate. Another step to minimize heat loss.