English translation of the original Spanish article. Read the original
Now that it's really cold and a wood-burning stove is worth thinking about, here is my experience.

Since I was very little I remember the radiators at home, always warm in winter, but the day I left home and winter arrived, it was a very important thing to do, to heat the house when it's cold.
For country houses, an installation of radiators may be viable, but country houses tend to have 4 open walls, more windows and higher ceilings. So at the end of the month if you have to heat the house with gas or diesel, it may cause some unexpected scares. “ A huge bill! “.
We at Can Pepitu opt for the wood stove (or biomass), since the cost of heating the house, as well as installation, is extremely cheaper than another system. Although it is more dependent on us. Following advice from country neighbours, we ran about 3 metres of flue horizontally through the dining room to keep as much heat indoors as possible.
Problems: One of the problems we had is that due to inexperience and wanting to save 30 euros and not go up to the roof of the house, is that if the smoke outlet does not protrude about 60-100 cm from the ceiling, when the weather is cold our dining room would fill with unbreathable smoke, the truth is it was dangerous. But I mustered up courage, went up to the roof of the house, put 2 plugs into the cornice and installed chimney. It was solved immediately, since the day after installation we reached gusts of air of almost 100 km/hr, and the stove behaved like a champ and with 10 metres of tube between those inside the house and those outside. Hehe.
Results: We can keep the dining room at about 25-30 degrees depending on how much we open the air intake damper and the upstairs in the coldest hours we keep it at about 18-19ºC. Which makes the house warm.
Tips: If you have this type of stove, you must have space to store approximately a ton of firewood. And be careful that if you put too much effort into it you will end up in underwear from the heat they generate.