thanks for the link WNY. i bought a 1' - 4" ss 316 20ga for $43.00 to get my stack away from my new siding. was getting some ash on it. so now i want to push the stove into the livingroom about a foot more at angle to get it away from the wall and be easier for me to the back. on DV unit does it hurt to have more pipe? i'll end up with about 48" of flue , all level going out.