ONDOL / HEAT
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'Suvibogenhelt' of Germany
Blocks left & right of the fire place by bricks so that enhances the heating effect.
Fire place of Rauchhaus, which chimney is none, that looks like a stove, was evolved into a ' Suvibogenhelt '.Even if 'Suvibogenhelt' blocked fire place by bricks, still it could not solve the smoke problem
Another problem was there. Wall used to split and crumble when fire contacts with wall.
Thus made, attached a plate with iron on the wall of the fire place rear side to help prevent this later on.
Heating effect became stronger since it prevented the wall and heat was more reflected into the room.
This shape became the one that is being seen a lot in German agricultural area in 18~19 centuries.