Do It Yourself Section:

Your finished chimney needs to be 3 feet above the roof-line and 2 feet

 above anything that is 10 feet away. We can not be sure of exactly how

 much chimney pipe you need and the kit is only based on an average home

 as explained above. You are totally responsible for the height of your

chimney,

DuraTech Install Instructions

http://www.duravent.com/docs/instruct/L150%20Dec05.pdf

http://www.duravent.com/docs/Catalogs/L930.pdf