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Three out of four office buildings in Singapore are wasting energy because of inefficient air-conditioning systems, according to media reports. A Singapore building of 20,000 square metres spends us $41,250 each month on air-conditioning, when an energy-efficient building would require only us $12,650. "Most owners don't have a clue as to how their offices are energy inefficient," said Lee Siew Eang, an associate professor at the National University of Singapore.
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