The Passivhaus standard or passive house, characterized by quantifying parameters such as insulation, tightness and air renewal, achieving significant energy savings and sustainability under construction.
This concept was created in May 1988 by Professors Bo Adamson of Lund University, Sweden, Feist's yWolfgang Institute for Housing and Environment.

To meet the established parameters, is essential to a rigorous control of infiltrations, and air quality and the incidence of sunlight, in order to optimize the intended consumer climate in both winter and summer, managing to reduce the same as much as 70%.

Standard Passive House you can apply equally to new construction, renovation and restoration, avoiding the problem in the construction involving the use, large energy losses over the life of the building

With this construction system, up to 90% Power over previous constructions to CTE (Technical Code of the building), and up 75% compared to buildings made according to the criteria established in the CTE.

The Passivhaus system makes appearance in Spain as clearly the future of building alternative and traditional rehabilitation, may become a hope for the revitalization of the construction industry for years to come because with this type of construction seems easier compliance with the European Directive on energy efficiency and achieving better energy rating.

The basic principles to comply with the Passivhaus standard are based on the following criteria:

· Correct orientation of the building. Grandes superficies acristaladas en fachadas expuestas a la luz solar para favorecer las ganancias solares en estaciones frías y protecciones solares de los huecos para mitigar el aumento de temperaturas en estaciones cálidas.

· Continuous envelope insulation to avoid thermal bridges and maximize thermal inertia inertial.

· Isolates be suitable for a maximum useful energy demand for heating and cooling occurs 15 kWh / m2 year respectively.

· Carpenter High energy efficiency, triple glazing and frames with thermal break, to approximate the solar gains 50%.

· Sealing the outer shell, not being able to produce penetration of air into.

· Air renewal must be equipped with a heat recovery, obtaining a 90% the heat energy required. The 10% the remaining demand is produced with solar collectors systems or heat pump energy-efficient (low consumption).

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By: Mario Pascual Ortega