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ONDOL / HEAT

Suvibogenhelt

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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 '.
(Picture 2) It is a shape that made a fence with bricks and set up a windbreak wall at left & right of the fire place and blocked the upper side as well so that helped prevent sparks rise high.
Nevertheless chimney was none yet.
It is because why once just make a fire, smoke is spread into the inside of the room through the upper side hole and then discharged properly to the outside. It was a shape that there is none that changed except that the fire place was just more safe and solid.

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.