Liner in 10.5x10.5 ID flue

[Lastfling]

I currently have an Appalachian 36bw insert with catalyst purchased new in 87. The insert was installed as a slammer and I’m going to upgrade with a liner. The stove has a rectangular outlet flush on top and I believe in looking at the Appalachian website requires a 8” connection. My existing flue is 10.5 x 10.5 ID and is an interior masonry / tile lined chimney approx 13.5 ‘ . Will an insulated 8” liner fit in this flue?

As info - the stove has worked well over the years and maintains enough coals overnight ,using 3 sticks usually , to make restarts in morning easy.

I don’t plan on replacing at this time - although I’m looking at installing another insert downstairs in the future that will have its on set of issues as that flue is 6.5 x 10 ID and enters the right side existing fire place. There are actually 2 flues entering this fireplace - one on either side.

 

[EbS-P]

Are there any bends or offsets? You might have a chance if it’s a straight shot and no mortar hanging out of any joint. Personally if I was doing an insulated liner I would upgrade the stove. I just did a diy install of a Drolet 1800i with 25’ of insulated liner for 2000$ Including tax for everything. An 8 in insert even with a a cat just doesn’t rev my jets. There are not that many new 8” inserts. Buck 9? Is the only one I know off the top of my head.

 

[Ctwoodtick]

A thought that comes to mind would be to clean the existing chimney and smoke chamber area really well before installing new equipment, especially with a slammer install.

 

[mellow]

Have you been able to source the rectangle to round adapter? That is another thing to consider as the rectangle to round cast iron generic boots are a PIA to install, you will have to drill and tap the top of your insert.

I would just use this as an excuse to upgrade to something newer that will use a 6" liner, plus at 13' you are on the short side for most inserts, you might have to install an extender to get you to 15'.

 

[Lastfling]

Are there any bends or offsets? You might have a chance if it’s a straight shot and no mortar hanging out of any joint. Personally if I was doing an insulated liner I would upgrade the stove. I just did a diy install of a Drolet 1800i with 25’ of insulated liner for 2000$ Including tax for everything. An 8 in insert even with a a cat just doesn’t rev my jets. There are not that many new 8” inserts. Buck 9? Is the only one I know off the top of my head.

its a straight shot down to the firebox, the only possibility of an offset / bend would be the connection to the stove itself.

 

[Lastfling]

A thought that comes to mind would be to clean the existing chimney and smoke chamber area really well before installing new equipment, especially with a slammer install.

Definitely. The chimney was just cleaned a month ago, but would be cleaned again before any installation

 

[Lastfling]

Have you been able to source the rectangle to round adapter? That is another thing to consider as the rectangle to round cast iron generic boots are a PIA to install, you will have to drill and tap the top of your insert.

I would just use this as an excuse to upgrade to something newer that will use a 6" liner, plus at 13' you are on the short side for most inserts, you might have to install an extender to get you to 15'.

Yes, adapters have been sourced - both cast iron and stainless. The stove has been drafting fairly well in its current configuration. I would think a liner would only improve on what is already there even with current height .

An upgrade may be in works at some point in future but for now it is what it is. I would upgrade and install new in the downstairs before I replace the upstairs.

 

[moresnow]

At least with only13 foot of 8 inch liner you won't be out all that much when you upgrade! May as well install a block off plate while your at it. Good luck.