Been doing some research on line about installing my Quadrafire 7100 and flue pipe. Flue pipe is the air cooled pipe.I have a cathedral ceiling and seen a couple articles and utube videos of people installing a cathedral ceiling box. Is this something I need also. Here are some pics of the stove pipe and my ceiling. Have a 6-12 pitch roof with a 3-12 cathedral. This is my first fireplace install and dont want to burn my new addition down. Sorry if this is a dumb question but want to get it right and there are allot of knowledgeable people on here. Im sure I will have some other questions on this install so I want to thank you guys in advance for your help on this. Fireplace is going to be installed against the wall between those windows in pic #2.