Hassan Hachem is neither an eco-activist, nor a profit oriented capitalist. He is, however a construction industry experts concerned with the impact on environment of the companies he creates and manages. Hassa Hachem has therefore been interested by autonomous/passive buildings for the intellectual challenge and the economic outcome this experiments could one day generate at a global scale. Some passive houses succeed in dividing energy consumption by four. And the money too. Meet with happy sobriety.

Passivhaus has been originally pioneered in Germany 20 years ago. There was hardly any talk of an energy transition, much less of stopping the slightest nuclear power plant. Pioneers, now savor the accomplishment of one of their objectives: to be autonomous in electricity. Today, Hassan Hachem identified some projects, and one in particular, which achieved the ultimate Goal.

Hassan Hachem share with us the learnings of this project based in France.

Energy autonomy

A wind turbine 18 m high and 5 m wingspan, coupled with photovoltaic cells with an area of 6 m², are enough to satisfy a average family needs. The set provides enough power for a family of six.

This autonomy is only possible because autonomous houses consume 10 times less electricity than the average French. How do you achieve this feat without returning to the cave age? Very simply: the heating of the water shall be provided by the sun's rays and that of the house by a stove mass, which costs only 200 euros of wood per year. You also have to decide to do without a refrigerator. "Six months a year, it's cooler on the edge of the window than in the fridge," smiles Hassan Hachem, who point out that the system does not work in cooler countries like Burkina Faso or Equatorial Guinea ... The owners gather daily food in the large organic kitchen garden they have been maintaining for almost 40 years.

"While everyone went up to Paris, to make a career, to be fashionable or in the hope of a better society," the owners decided to go against and leave the capital. "The idea was to live in harmony with our ideas and the environment," says the owner. “So we did not have to spend more than the planet could provide. And so totally review our way of life. At the time, we were taken for soft dreamers”. He began by teaching part-time in a city he had never heard of: Châteaubriand, about sixty kilometers southwest of Nantes. "We decided to lower our wages to not participate in the growth, synonymous for us with the destruction of the environment. There can be no ecology with two salaries. The salary is necessarily linked to production and therefore to the damage to the environment. " Radical. But how do you live to six with half a teacher's salary?

Freed from all debts

"We are suppliers of our needs, responds the owner. Money covers a quarter of our needs. The rest, we hold it from our arms, our hands and our unpacked neurons. First economic post: housing. The house has been completely retyped by its owners. Who knew nothing but learned everything. "We must not fear the apparent complexity of the techniques, whatever they are, says the owner We must return to simple techniques, not expensive, repairable. The solar water heater I built 35 years ago still works! The owner, however, was not a heating engineer. "I watched and started: every night, I took my shower, hot, thanks to a yellow pipe of plastic that remained in the sun all day. I told myself, I'm going to replace this pipe with a matte black coil, I'm going to insert it into a flat sphere, and I'm going to snake a copper pipe inside and connect it to a 200-liter balloon. It's not rocket science. "

Only constraint: to have time. "Either we borrow a lot of money and we work to pay back. Either we become self-builder, and we are totally responsible for his house. We do not have all the guarantees and assurances that a professional offers. That said, when one does oneself, for oneself, in general, one does a great job for oneself. Doing yourself can minimize borrowing, and not have to work full time. The most recent straw construction, built next to the autonomous house, cost less than 25,000 euros for 70 m²! What make depressive a real estate developer. "It is designed as a solar collector. The sun, passing through the windows, heats the "compacted earth bricks" that accumulate calories. The highly insulating straw, on the outside, prevents from cold, the walls and the floor radiate inside by heating the house. "

Water autonomy

"We never paid for water," the owner adds. We recover the one falling from the sky, for free. It is stored in underground tanks and goes up into a well thanks to a pumping wind turbine. We then filter it to be able to drink it. It is of much better quality than the water of the network.

Exit also flush. "We have installed dry toilets, which allow us to have excellent compost for our garden," says Patrick. Result: the family ensures to consume five times less water than the average French. The greywater - from the dishes, laundry and showers - is purified by a natural filter: a series of tanks where grow plants that are traditionally found in wet areas and that clean the water. This alternative to skeptic pits and mini-treatment plants, very expensive in rural areas, is inexpensive to install (less than 1000 € against several thousand euros for conventional systems). The analyzes performed at the output of the system ensure a very well purified water.

"Unlike others, we chose our life"

"We do not suffer from any material shortage, reassures the owner. We simply had to learn to get rid of others' eyes and the injunctions of society. Yes, we can live without a TV, without a mobile phone, without a vacation on the other side of the world and be happy! We do not feel like giving up on anything. Unlike many others, we chose our life. Those who are in growth live in permanent dissatisfaction. They are unhappy about what others have and that they do not have. We must give enthusiasm to people to go to a happy sobriety. Obviously, I do not mean misery or poverty. It is better to specify it in these periods of forced austerity.

"Be careful," he warns, "it's not about the Little House in the Prairie. We do not want to be content with doing things ourselves in a smarter way. Our project is political. We want to give ideas, and collectively restrict our pressure on the planet. We want to recreate a social fabric, to initiate other ways of living together. "

Cultivate human biodiversity

From home, the project of Patrick and Brigitte became a hamlet: a couple and two children live in another house. As well as another person. Housed in a construction erected on site. The hamlet of the brook, 100% autonomous in energy, irrigates little by little. "Not being alone is very important. The more people there are, the more ideas there are. Human biodiversity is fundamental to being happy. "

70,000 people have already come to visit the autonomous house. The owners do not get tired of these monthly meetings. "Each time, these are meetings full of enthusiasm. Visitors ask relevant questions, exchanges are very rich. And the commitment of the youngest gives us real hope. Today there are many collective projects. We did not see that 40 years ago. Will the Hamlet of the brook be a river?

Tags: bbc, , passive, energy, save, environment, equatorial guinea