( Q1 }0 W6 `; C2 @4 |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! b& J: g$ S( A5 `; P! A1 ] . q2 ~: D. i# y2 P6 ]These kinds of device need be cleaning and maintaining before winter season.