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Proprietary education video from Chiu Sir


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Have you ever tried walking up and down at home and adjusting the radiator valve by hand with a hard feeling?
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When turning on the central heating, all heat radiators inside the house will be on for heating the space, even if there is nobody inside the room but with no choice, wasting both energy and money
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Forgot to turn off the heat radiator after leaving home, and just waste a lot of money?