3 Q& h7 L \1 m1 D) |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!* C+ A) Y/ x9 x z$ y% R- A9 e
9 C" }9 M& V: c9 J$ C0 N
These kinds of device need be cleaning and maintaining before winter season.