" }7 v% y0 a }8 F3 a* X, c# p' ^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!$ L$ L9 C/ X- p6 t" S
, t: ?# d/ v' M0 X( M. s; R: {These kinds of device need be cleaning and maintaining before winter season.