Chimney Liner

In the process of shopping around to reline my chimney this summer. Chimney is all block exterior with terra cotta lined. Looking to go with 8" smooth walled flex liner insulated. However the the way this chimney was built so that the furnace could be run into it is, the current clean out door is above the thimble where my stove pipe goes into the flue, which isn't a problem as I always take my stove pipe off anyway when I sweep and then clean the flue at the thimble inside the basement. I see whenever an insert is hooked to a liner that an appliance connector is used and the liner is ran directly to the insert. Would I be able to do the same with my furnace,
Turn the liner through the thimble and put an appliance connector on the furnace and cut out the need for the stove pipe?

 

My wood furnace is the only thing vented in the chimney. It's our only source of heat in the house.

 

I don't see a reason why you couldn't just run the liner up then through the thimble and not use any stove pipe.

Aesthetically speaking, it may not be the best, but if it's hooked to a wood furnace, it's probably in the basement anyway.

Welcome to FHC gandy85 !

 

Haha ! Nope ! What little bit of basement we have is taken up by the furnace, always keep two weeks worth of wood in the cellar and hunting gear !

 

Keep in mind that the liner is not very good at anything but long smooth bends. The bigger it is the harder it is to bend as well.

When I installed the 6" SS liner in my Terra cotta lined brick chimney I was impressed at the rigidity of it.

 

I'm out of town for work right now or I would !

 

This issue came up in another thread on another site...a well respected chimney professional posted that chimney liner is not legal when used in place of stove pipe. And Horkn is right, 8" liner is not very easy to bend around, you'll end up with a very large radius on the turn to the furnace

 

Well, there's your answer. You'll have to run pipe up through the thimble,

 

That would work perfect , and was really hoping that it would work. I have double wall duravent now and my furnace is top vented. I run a 90 from the stove to a 18" horizontal run that 45's into a short piece of single wall that goes into my thimble, ran single wall on last section as its out of the way of combustibles and had to do some trimming to get it to fit to thimble. If I could run the liner through the thimble I'd just put right onto my 45 where I have a double wall to single wall adapter and would easily be able to dump the liner into a bucket when I sweep.

 

Our chimney guy wouldn't even consider flexible pipe. He just said "why would you want that?"

he used 6" rigid SS. 6' joints. Very nice stuff
ours had the cleanout just below the stove connector in the house so he just used 2 "snouts"
one for the stove pipe and one for the cleanout (capped)

(Woodstock Soapstone Co. requires 6" flues on all their [EPA] stoves)

 

I would think the mortar would break off easy. I'm sure the chimney guys see that often.
As long as the liner goes in easy and straight it would not be a problem. Vermiculite would fill in around the irregularities easily.

 

Find a foot or two of well casing or something similar that is about the same diameter as a liner, attach a rope to it, drop it into the chimney until you get to a spot with mortar...pick it up a foot or so then drop it to bust off the offender

 

I believe it is ok.
But it's expensive and I think you wrap it with insulation before you install it where the rigid is dropped in quickly and the insulation is poured in around it afterwards. Rigid is very smooth inside and easy to clean. And straight

 

You'll need to talk to a pro and get estimates.