A unique stove that saves 50% of wood, heats for 50 hours, built instead of an iron stove

A man built a stove for himself to heat his house for 50 hours while saving 50% of wood ! The stove is the heart of the house and it is important how much heat it gives off, how much wood it saves and how long it heats ! The unique bell technology during the construction of the furnace allows not only to retain heat but also to significantly reduce the emission of soot Here is the link to his channel @sauliusprabulis2156/featured