Okay the furnace was much easier to install 'door side up' because there were no transitons required, but I've already changed it to a horizontal called in the trasitions, and finished the job. so no pictures of my mistake. Some of you are quick to cast stones but at least I am confident enough to admit my mistakes and fix the problem. what matters is its installed correctly and safely and I learned that the heat exchanger isn't designed for this application. on my own dime so the job doesn't go under.