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For the people living together in the share house are very sensible with their electric bill. There are people who use more electricity than the others. People who use less electricity are dissatisfied with their bill and sometimes it causes some conflicts. Like the key tag system, a service to control and measure the electric use of my room separately so that I only pay for the amount I have used. It's a personalized cooling & heating system.
Incheon, Korea, South Korea