I set up a class A chimney for my chubby last year. I chose a location that did not require a long run of class a stainless steel pipe, it's expensive. Mine runs about 6 feet above the roof of a sun room. It has to extend that length because another roof line is near, for the main part of the house. You need to go to your town hall and get the specifications from your building inspector. Follow them exactly. I can tell you they measured the clearances exactly to the standards when they inspect it. Also be sure to consult you home owners insurance. Mine said no problem as long as it passes inspection. I found an HVHC guy who is licensed and does the work on the side. My total cost was around $1200.00. Be sure to have working smoke and CO detectors too. The chubby is a great stove. Hopefully you can find a good source for coal. I hardly burn wood at all. Coal is just so easy to use. 12 hour burn times, no sticks and twigs on the floor. Good luck!