These are houses used by people who want to save the environment. They live day in, day out, the energy the sun provides.
A smart way to save energy is in a solar house. The house is so constructed that in the winter it saves as much heat as possible, and it is keeping the house cool in the summer.They do that the following way: A lot of windows on the sunny side of the house and trees on the shady side. The windows are double glazed so the sun remains inside. The trees on the shady side keep the wind in the winter. The house has thick walls and the floor is insulated so no heat can escape. Above the windows there is a large canopy. This canopy is used to bring a shade in the summer. At night, when the sun is gone, there is, thanks to the double glazing and good insulation, enough heat. The people in the house do not need a central heating through the night. This saves a lot of energy.
Usually, these houses have three floors. On the upper floors, are often some solar collectors and / or solar cell surfaces. These houses almost never need electricity from a power company. They can sell electricity to an electricity storage.
