The architect designed the sealed enclosure for the house, so the house had almost no heat loss and no cold air was blowing in. "Passive houses" can not only be heated by the sun, but can even be insulated by the heat released by the appliance or the occupant's body.
In Germany, the construction cost of "passive houses" is only 5%-7% higher than that of traditional houses. The new design uses a sophisticated central ventilation system. The intake and exhaust pipes are placed side by side. At the same time as the warm air is exhausted, clean cold air is introduced and the heat exchange efficiency is up to 90%.
According to The New York Times, there are about 15,000 "passive homes" in the world, most of which are built in German-speaking countries or Scandinavia. In 1991, the German physicist Wolfgang Feist built the first "passive house". However, due to language relations, the spread of the concept of "passive residence" has been delayed.
The "passive home" industry has flourished in Germany, and schools in Frankfurt use this technology to build school buildings. In addition, its popularity is expanding. The European Commission is promoting the construction of such houses, and the European Parliament has also proposed that new buildings should meet the "passive dwelling" standard by 2011.
Today, Passive houses has become an industry standard with a heating capacity of less than 10 kWh per square meter per year. This standard is very high, 18 times lower than the current German average and 16 times lower than the UK. From this figure, we can see how serious the waste of old-fashioned houses is!
Passive houses achieves this goal by five:
1, Wall insulation;
2, Reduce the window area;
3, The seam is sealed;
4, To eliminate unnecessary air exchange channels;
5. Heat exchange of air before ventilation.