At our house we heat with three different heating sources. First we have a boiler. In the boiler we can spare warm water for taking a shower. But it's not very good for the environment, because a boiler need very much electricity.It's not renewable. We heat also with solar panels. They are installed on the roof of our house. The solar panels convert sunlight to electricity. So a house can produce their own electricity. At least we have a normal heating system like every other house.
