Do you know the ondol?

Ondol is a traditional heating system.

When cooking in the kitchen, the warm air heats the room.

The air go outside through the chimney.

Inside is warmer than other part.

Because the air is cooler during moving.

So the oldest sit inside the room, and the young people sit near the door.

It is from the goguryeo period.

Because the northen area more cold the southern.

Our ancestor survived during winter use ondol.

Ondol shows our ancester is very superial.

Today I feel our ansestor's wisdom.

I respect our respect.

Thank you for listening my essey.