I was wondering if I need to run my OAK to the outside of my house or if i can just end it in my garage. I have a Harman Accentra with a zero clearance box. The venting goes straight up through the roof of my garage and wanted to install an OAK but do not want to run the pipe along the wall of my garage and wanted to know if it is safe to just draw the air from my garage. The zero clearance box sticks into my garage about 2 feet and wanted to just run a 2 foot pipe straight up and add a 90 and draw the air from the garage any help would be great