; d$ y" q% I, D* h7 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! 4 E, w1 |7 m1 |7 g Y5 i, t( {3 @2 C# ^4 ^( [
These kinds of device need be cleaning and maintaining before winter season.