; q, T9 w# e+ D5 GThis 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! 8 ` I/ h* f. m7 q. M" H; P p* X5 R. e2 y) R7 F5 x3 B. @2 n! _
These kinds of device need be cleaning and maintaining before winter season.