Masonry Thimble

[theedge99]

Hey,

I would like to install a wood stove on an existing exterior masonry chimney. Its a 6 inch inner diameter wall thimble inside a square concrete block which is about 10.5 inches total width across. I don't know if i can just connect to it or not due to clearance to combustible requirements. The last pic shows a close up looking inside the crack along the bottom of the concrete block into the wall. You can see wood framing in there.

The chimney is lined with clay and doesn't appear to have ever been used as the clay is still clean.

I have the Englander VL-17

 

[begreen]

Not sure that is a proper thimble. There's supposed to be 12" of masonry to the nearest combustible.
https://www.hearth.com/econtent/index.php/articles/passing_a_chimney

 

[bholler]

You should really have a chimney properly inspected (level 2) by a pro before installing a new appliance in it. And no that timble does not have enough clearance to combustibles at all. But there may be more issues have it checked and the sweep can give you options to fix the thimble when they are there

 

[theedge99]

Yeah I am going to get a WETT technician to come look at it. Just hoping to learn some more about it before they come.

I also have another stove I was thinking of putting in there at first, an original Little Cod. Its not a certified stove and I would need heat shields, but it only needs a 4" stove pipe. Would I be able to use maybe a 4" piece of insulated stove pipe or chimney pipe and put that through the 6" thimble?