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The EnerPHit Standard is the concept for building renovation developed by the Passivhaus Institut.
It consists of remodeling a building using Passivhaus components. In this way, it is achieved that an existing building notably improves its energy efficiency as well as its comfort for users through better windows, insulation and ventilation system, as in the Passivhaus buildings new.
In this way, we not only make sure that new buildings are efficient, but we can also gradually make all our buildings energy efficient as well.
What is passive house (PH)
The concept of passive house (“passive house”) implies a house with a very low heating demand (less than 15 kWh / m²a). This means that, for example, a house of about 100 m² will not need more than 150 liters of oil or 150 m³ of natural gas per year (not including domestic hot water) for heating.
In very cold climates, the key elements are a high level of insulation of the building epidermis (walls, windows, etc.), high sealing and energy recovery in the ventilation system. In warmer climates, overheating control strategies become important (awnings, night ventilation, etc.).
Compared with buildings adapted to technical code, significant energy savings of up to 80% can be achieved in some cases.
But PH does not only manage to save energy; As the measures taken in hundreds of “passive houses” show, both the thermal comfort and the indoor air quality are much better than those of a “normal” house. Since 1991, more than 8000 PHs have been built in many European countries, the majority in Germany and Austria.
What is passive house retrofit (PHR)?
In recent years, the measures and principles of the PH have been successfully introduced to the rehabilitation of the existing building park. Depending on the type of building, the energy savings can vary in a range of 80-95%. Heating demand is reduced from 150-280 kWh / m²a to less than 30 kWh / m²a.
In some cases, as pilot experiences show, the PH standard of 15 kWh / m²a can be achieved. As has been proven in practical cases in different countries, the rehabilitation of buildings according to the standards of the passive house (PHR), it is economically viable for a certain building typology.
What is the objective of this PHR web-tool?
The web-tool for the renovation of buildings according to passive house standards is an easy-to-use method that can help companies in charge of managing homes when deciding which of their buildings is more appropriate to carry out. perform a PHR and how this rehabilitation can be carried out in the most economical way.
The tool provides general information about the principles and advantages of the PHR, its characteristics, the measures to be carried out, the costs and the economic viability. For each type and year of construction of the building, different energy concepts are presented.
More information about it from…. Energieinstitut
An example would be the present single-family home… HERE. (It is in English)
