本帖最后由 移民电工 于 2010-12-21 22:15 编辑 ; s( j# M* F5 ?, L0 F* f g& r5 E5 |7 T& VThis 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! 1 w# `" x; s) v5 m4 n ( p0 \% _8 d! `5 |These kinds of device need be cleaning and maintaining before winter season.