Putting a liner in existing Class A- stove swap thing

A friend of mine is replacing an old smoke dragon with an NC 30. Interior is 8" single wall up, about 8'. Exterior is 8" class A, 'bout 12' -so 20' total rise, straight up.
Looking for the least expensive way to vent the NC30.
Can a 6" liner fit down through the 8" Class A? or...
Run new 6" single or double wall to a 6"-8" adapter connected to the existing 8" Class A? Not my choice.
What do you think? Looking for options. Thanks, JB

 

I'd try the 6" stove pipe to the increaser route. If it doesn't draw well, then revisit the issue.

 

Guess I'll recommend the increaser, see what happens. Now, dbl. or single wall for the interior? He has no clearance issues so single would work fine.
I'm just concerned about accumulation in the 8" that could happen. This is going in a winter rental, no idea who or what will be operating the stove.

 

Some say use s/w so you're getting heat off the pipe as well as the stove.
Some thinking says keep the heat in the pipe to improve draft.
Good luck to him with part time renters running a stove. How's his firewood? If it were me, I'd be checking the pipe to make sure it wasn't getting clogged up, as you can still do that even with better firewood when using less than ideal burning methods.
Just my thoughts.

 

JMNTBHO; but I would never rent a house to renters that had a wood stove in it. Way, way, way too much to go wrong!!!

 

Luckily he has a local company that is on contract to clean the flue pipe. Good thing too, it's about a 9/12 or 10/12 pitch roof. I didn't offer to help with that.

 

I hear you! I shudder to think about it, but- oh well.

 

One word..... insurance

 

Wood stove for renters??

Personally I would want the 6 inch all the way up.
But being that there is a good chance that his 30-NC is gonna be a glob of molten metal in a few weeks anyway, he might as well just save the money and leave the 8 inch in place.

 

Imo, I'd go liner all the way down.

I'd also make sure the place has adequate insurance and require the renters to show you proof of renters insurance for their contents.

Tenants don't even get a gas stove in my family's rentals.

You are a braver man than I am bk.

 

Met with him tonight. Pointed him in the direction of an established stove shop in Breckenridge. Told him to go over the options. Let them add some direction concerning the liner vs. 6"- 8" increaser and hoping for the best. I'm trying to distance myself from being the "authority", 'cause I'm not that guy.
I'll help install stuff if everyone is on board with the same idea.

 

I run an 8-inch chimney with 6-inch pipe to the ceiling, straight up , about 16 feet total from top of stove, works for me, clean the chimney once a year

 

update-
The 30 is on a pedestal, so we lifted it with some 3" square tube to allow air flow, because the hearth darn sure didn't have the required R-value protection. Might even have to add more clearance, not sure. Thoughts?
He went single wall to the 8". Going through break in fires right now and no evident leakage. Even though it's warm (upper 50s), it's drawing ok.

I recommended 2 thermometers, one stove top, the other a flue probe. I've only used the probe in double wall stove pipe, any issues with single wall?
I'll know more next week when he does a full load , Thanks, JB

 

Single wall pipe should get a surface only thermometer. They are calibrated differently than the probes. One magnetic on the pipe, another on the stove