Did not deliver on what was contracted. Installation was changed just prior to installation. Space was a premium and it was made clear when the quote was requested. They gave a good solution to minimize space taken but changed it at installation. Ended up taking a lot more space. They did not put in a lintel in the brick wall that the ducts passed through which has created a serious structural problem. The hole in the wall was left open. When I phoned to raise my concerns I could not get a word in with the Director. They were just trying to justify their mistake.