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ATT Systems Singapore

Try not putting the temperature up too much, as it may be unnecessary. If you're cold, put on a warm sweatshirt and some cozy socks. Having the heat up high wastes a lot of energy. Don't leave lights on that you aren't currently using. For example, only use lights at night when they're absolutely necessary, and turn them off when you leave a room. Refrain from leaving a large number of lights on.
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