Mark Pushner ;by now you have 6 weeks more experience on these pages, and many of the questions you had have been answered. To answer the question you asked if only in part, Ianto Evans one of the original people to intuitively grasp the value of mating Rocket stoves with cob - a poor mans Masonary Stove, built a 8'' system at an early work shop and changed to a 7 '' 1/2 way down the thermal Mass, this was at a time that his decrees were never questioned. You are near the far end of a doable horizontal run on this build, Your exhaust gases may have cooled to the point where at your location it may not draw during cold damp weather and excelent during cold snaps! You have a few to many climate introduced variables to give a good answer ! hope this helps a little ! pyro-maticly yours ! Allen L.
Success has a Thousand Fathers , Failure is an Orphan
LOOK AT THE " SIMILAR THREADS " BELOW !
Location: Northern New York Zone4-5 the OUTER 'RONDACs percip 36''
Yes, you CAN use a 6 inch chimney with an 8 inch system.
You MUST remove enough heat from the system so that the exhaust gasses contract enough that they will fit down the smaller tube easily.
I know, too damn much gray area.. Unfortunately, there isn't yet a clear rule (that I know of) to use for this.
You will have to experiment, if at first it doesn't work, find ways to dump more heat from the system (longer bench, exposed bell systems, etc) and repeat till it does..
Build it yourself, make it small, occupy it.
Lasagna is spaghetti flavored cake. Just like this tiny ad:
Heat your home with the twigs that naturally fall of the trees in your yard