The whole discussion on whether 37°C or 40°C is hot or not rather misses the point which was the use of a wood-burning stove when there is no need to heat the e

The whole discussion on whether 37°C or 40°C is hot or not rather misses the point which was the use of a wood-burning stove when there is no need to heat the environment. One of the ways this can be done is by using fuel that burns fast and hot so the amount of heat can be regulated more easily, another way is to simply use a smaller stove [1] which is placed on top of the existing one, in Swedish this is called a 'sparspis' (spar = to save, spis = cooker). The exhaust for such a stove sits on the bottom, it connects to the chimney by removing as many rings as needed to get a tight fit. These come in single (like the one pictured in the link) and double-ring versions. The smaller stove uses less wood - it is fired with sticks and branches picked from the forest - and spreads less heat. [1] https://gamlavikmanshyttan.se/annat-se-lasvart/sparspisen/ https://gamlavikmanshyttan.se/annat-se-lasvart/sparspisen/