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、节能=节电___只倘使费电的东西，年夜年夜年夜年夜年夜年夜年夜年夜年夜年夜年夜年夜年夜年夜年夜年夜年夜年夜年夜年夜年夜年夜年夜年夜年夜年夜年夜年夜年夜年夜年夜年夜家就感觉不节能。___看起来彷佛是真的！___实际上，年夜年夜年夜年夜年夜年夜年夜年夜年夜年夜年夜年夜年夜年夜年夜年夜年夜年夜年夜年夜年夜年夜年夜年夜年夜年夜年夜年夜年夜年夜年夜年夜家被费电二字给捆住了，从窄义的经济方面来讲，省钱才是硬道理。 一个供暖系统，从经济上来讲，他该当包孕：初投入、能源费、配备折旧（刻日）
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