) n& b* |# Q: q, j' O; K0 rThis 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! - _; k4 T3 \! F8 L) V& j" s4 C7 D1 z- L6 I( [$ f- U( y
These kinds of device need be cleaning and maintaining before winter season.