What measures are required for the "Energy-efficient house" standard?
The energy-efficient house is in That is why more and more homeowners decide not only to meet the minimum standards in terms of energy, but to save even more energy and thus costs. However, there is another reason for the energy-conscious trend in the construction sector: anyone who builds energy-efficiently can use government subsidies. But how exactly can a normal house actually become a so-called energy-efficient house?
Definition of terms: What is an energy-efficient house?
With 40 percent of the final energy demand, the building sector in the EU is the largest consumption sector, ahead of transport and industry. The final energy is mostly needed to heat and heat water. Only 17 percent of the required energy is used for electrical appliances and lighting. Accordingly, there is a great potential for savings in this area. For this reason, energy-efficient houses are increasingly in demand.
An energy-efficient house is the name given to all functional buildings and residential buildings that have been built or renovated using standard energy-saving measures. However, it can not be concluded from the term whether the house saves 20 percent or 90 percent heating energy. There are even energy efficient houses that achieve a positive energy balance. For this reason, energy-efficient houses are divided into different categories.
The various energy-saving houses at a glance
The following energy-saving houses are distinguished:
- Low-energy house
- 3-liter house
- Passive house
- Zero-energy house
- Plus Energy House
There are clear rules for these subdivisions, which must be adhered to in terms of design and efficiency. The exact measured values for the consumption of hot water and heating water must be observed so that the house receives the respective label. In addition, special technical requirements are placed on the windows, the insulation, the cooling and the ventilation. Depending on which standard is actually to be achieved by the construction or renovation, other measures are therefore required.
Low Energy House
To be considered a low energy house, the building's annual heat requirement must not exceed the limit of 70 kilowatt hours per square meter , This corresponds to 7 cubic meters of natural gas or 7 liters of heating oil per year and square meter. No extra overhead is required to meet the standard & quot; low energy house & quot; to reach. For the construction, only ordinary components are used in an improved variant. For this reason, the additional costs for a low-energy house are a maximum of eight percent. For example, heat protection windows, a solar system for hot water preparation and an energy-efficient heating system are used. The cellar and floor ceilings as well as the roof are equipped with a 20 to 40 centimeter thick insulating layer. The concrete measures required for the standard & bdquo; low energy house & ldquo;
A 3-liter house consumes a maximum of 30 kilowatt-hours per square meter per year, which is equivalent to about three liters of heating oil. This derives the name of this energy-efficient house. In principle, the same materials and components as the low-energy house are used, but some components are implemented even more energy efficient. This applies, for example, to the heat shields. In addition, further measures are required. For example, heat-insulating window frames are installed and a solar system is installed which heats up the supply air.
The passive house is still more energy efficient than the 3-liter house, because it requires 15 kilowatt hours per square meter per year, only half of the energy. Thus, you only pay 25 euros a month for heating costs. The passive house has the special feature that it can be kept warm without an active heating system. The sources of energy used are the incident sunlight, the heat losses of the electronic devices and the body heat of the inhabitants. In a passive house, heat losses are consistently avoided. This is achieved for example by the airtight outer shell, a heat-glazing, an ideal insulation and the prevention of thermal bridges. For example, you can detect and eliminate heat loss with a thermal imaging camera. In winter can be attributed heated with any heating system when the internal temperature should not be high enough once.
Zero-energy houses are basically passive houses, where the energy required is generated directly on or in the house. This works, for example, with photovoltaic modules or solar systems. However, zero energy houses are currently so expensive that they are hard to find. In the future,
is the likely change, because the prices of fossil fuels are increasing the Plusenergiehaus even goes one step further compared to the zero-energy house. In such buildings more energy is produced than is needed. The excess energy is then fed into the public grid as electricity, giving the homeowner an additional source of revenue. Even plus-energy houses are due to the high price so far widely used not so
In summary it can be said that & bdquo;. Energy-efficient house & ldquo; is merely a generic term for all functional buildings and residential buildings that have been renovated in terms of energy. The energy efficiency they actually offer depends on the specific label. If you are interested in building an energy-efficient home or renovating your home with the goal of higher energy efficiency, you should, for example, seek advice from Viebrockhaus. Also find out about the subsidy opportunities that are available to you from the state.
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