本帖最后由 移民电工 于 2010-12-21 22:15 编辑 $ T$ W# `( ]9 z: e8 k/ x, \% K
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This is a horizontal furnurs mount on the top of building and intake air form outsid of building, I think you can not fix it by yourself! * U: M4 V) H6 `1 h2 S + ^; P6 A' z9 U/ JThese kinds of device need be cleaning and maintaining before winter season.