Anyone who dreams of living in the countryside wants to create a warm, cozy room for a healthy life.
However, I often see cases where people have a hard time lighting a fire in a large-scale fire pit because the fire doesn't light well and they suffer from the smoke that comes out every time they light a fire.
There are rooms where smoke leaks out through cracks in the floor, making you feel uneasy all the time, rooms where the lower part is blackened but the upper part is cold, rooms where a lot of firewood is needed or the floor sinks, etc. We often see cases where people suffer from inconveniences due to rooms that were built for health reasons.

However, if you know the scientific principles of how a gudeulbang works and make it, you can avoid these inconveniences.
Whether you build it yourself or outsource the construction, if the owner understands the principles of the spheres and participates in the construction, you can create a good sphere.

This book is for those who want to make a good gudeulbang themselves but are curious about the principles of gudeulbang.
This book is for those who are making a mud room for the first time in their lives.
The scientific principles of the spheres are written in a way that anyone can easily understand.
We have listed the problem-solving methods for making good balls one by one, and included specific construction methods and know-how.
And we have attached a detailed design drawing that can be applied to an actual room.