; Z* R' F1 B- _' m9 }* EThis 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! d, i: q# H3 Z+ U9 K- v
% G @- q: a" a5 l1 B+ |3 A8 cThese kinds of device need be cleaning and maintaining before winter season.