How will the houses of the future be like? The answer may seem trivial, but in this video we will discover that this is not exactly the case. Probably our homes will become energy self-sufficient and “intelligent” thanks to domotics, our future technology. But how can these two objectives be achieved? Here are the houses of the future.
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As for energy self-sufficiency, passive houses have existed for several years. The definition of passive house was coined in the early 90s by Wolfgang Feist's Passivhaus Institute: to talk about a passive house, a building needs to consume no more than the energy equivalent of 1.5 liters of Diesel oil per square meter for heating only. Over the years it has become a standard and other design criteria and parameters have been added regarding comfort: the useful energy requirement required for heating and cooling must be less than 15 kWh per square meter in a year. Born in Sweden in 1988, passive houses then spread mainly to Germany, Austria and Holland and other Northern European countries and also to the United States, where there are two versions of "passive house" promoted by two separate entities: the Passive House Institute (PHI) and the Passive House Institute US (PHIUS). PHIUS was originally an affiliate and approved trainer and certifier for the Passive House Institute. In 2011, PHI canceled its contract with PHIUS for misconduct. PHIUS disputed PHI's claims and continued to work to launch an independent construction performance program.
The construction of a passive house requires that you start from the foundations, with the construction of a thermal coat, that is an insulating coating on the outside of the building walls, so as to wrap it completely. We then move on to the vertical elements of the passive house through the construction of external light walls, typical of buildings with controlled consumption. The internal temperature is kept constant thanks to forced mechanical ventilation devices: a double system of pipes, with an outlet circuit and an inlet circuit. The outgoing hot air (from the kitchen, bathroom and toilet) is conveyed to a flow exchanger, where the incoming cold air receives 80-90% of the heat and re-routed inside (living room and bedrooms. bed). The external air flow, before reaching the heat exchanger, in some buildings is conveyed through a geothermal heat pump where it undergoes further heating. The ventilation systems of passive houses are silent and highly efficient (from 75% to 95% of the recovered heat) and require little electricity (about 40-50 Watts), but they can cause the problem of too dry air.
In a passive house, the use of renewable energy sources is essential. The solar panels allow you to heat the water for sanitary purposes while the mini wind turbine allows the supply of electricity. A solar thermal system can cover 40-60% of the entire low temperature heat requirement of the passive house. Tanks properly installed in the garden allow the recycling of rainwater where possible (toilet, water for the garden and plants.). Finally, the heating / cooling system chosen must be able to exploit these totally free energy sources to ensure internal comfort in the hottest and coldest seasons. Of course, passive houses do not have the same costs as a traditional house. However, they are more affordable than they were a few years ago. Those who want to build a passive house make a conscious and sustainable choice, knowing that over time the initial expense is offset by the zero environmental impact of their home. Despite the higher cost, would you like to live in a passive house? Let us know in the comments!
How to organize a 'passive house
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