We live in a quite big flat. Our normal heat source would be oil but in 2017, we built a wood heating source. We only have to use a little amount of wood to last for at least 1 week! Its a cool way to heat our house as you even can cook some food like a pizza in a integrated oven on the right side
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Our house is heated with woodchip heating. The water is stored in a 5000 litre boiler. Unfortunately, I don't know exactly how much energy the heating needs and what our family needs in a year.

Because we own an old house we heat it with wood. We have a wood-fired heating system.

Picture 1: Oven
The wood we need is from our own forest. My father fells [1] the trees and cut them into pieces of firewood which fit in our oven.More...