Brand new to this forum and to the woody lifestyle. Been reading all the great info on here and has been a great help to me. Following is a pic of my install triple wall offset which is two 15's(maybe 30's not sure , you tell me) I connected together so I could get around roof joists. Question is, IS IT LEGAL according to guidelines? Did the install myself and chimney goes straight up except for this jog. Everything I read in install literature(U.S. Install guide put out by Selkirk) on off sets leads me to believe this is fine. But have also read that you cannot connect two offsets at all. What is right? I have awesome draft. am above every peak on house, great clearances on all chimney and pipe work, but this is causing me to lose sleep not knowing. I could have put a section of 12" triple in between the offsets, but used it for chimney rise instead. Kinda too late now, since that would put me out the roof in a different location. Please look and tell I'm O K. The offset does'nt fall into any catagories requiring a straight section in my install lit. The offset is about 3 1/2 inches on chimney center line and 10 inches of rise. I can see all the way to the cap form bottom. By the way I'm running a 3 yr old Quad 3100 Millenium, 6 ft approx. of single wall to 48" of triple(through a cathedral box) then the offset then another 11 ft triple straight to the cap. Works awesome so far with test fires and drafts like crazy. Thanks ahead of time for any input, hope I gave enough info. By the way you Quad owners here are the reason I bought this, talked me right into it by just your postings. I did all my research here before I bought. I was going to look at the Quad and found this site 2 days before(good thing since it was an hour and a half from home). NO REGRETS thusfar. Got an awesome deal> Got everything mentioned above plus prefab hearth and fireplace tools for $900. I think I stole it!