本帖最后由 移民电工 于 2010-12-21 22:15 编辑 ' w2 m6 W- f. k% Z1 M) c5 W' I 7 _( {+ k+ ` T; j jThis 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! / N4 S& C- z* Y" ^ + i7 F- o2 s$ _" SThese kinds of device need be cleaning and maintaining before winter season.