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Cold countries have people who think their winter is too cold. Its not easy for them to take off their clothes and have a good sleep even they have a radiator in their room. You should concern about the oil prices if you want to get warm enoughly. In addition, You couldnt get refresh after they sleep in these room. Have you ever thought about if the floor is warm?
Id like to suggest a brand-new heating system which is not only has a good energy efficiency but also a good for health with Korean wisdom for living.
hong-ik University
Seoul, South Korea
Don-tae Lee
hong-ik University
Seoul, South Korea
Kun-woo Yi