Room sealed stove (wood burner) out the side wall?

Thanks Dathi, that's makes for depressing reading, I was planning on dying of carbon monoxide poisoning and it looks like a horizontal flue is a good way to do it.
Soot balls flaking off the flue and falling back into the flue clogging it.

I must have lost my ability to search, because I did try before posting this, now I see plenty of threads showing similar discussion in the past

https://www.boards.ie/vbulletin/showthread.php?p=68147025

https://www.boards.ie/vbulletin/showthread.php?p=82831752

Thanks all the same

Thanks Jimbey, I guess that would be the only option, I wanted to avoid a big dirty stainless tube hanging on the outside..
Might break the roof afterall and go standard option.
I think it's good to keep as much of the chimney internal too, to help with a good draw. Maybe is doesn't matter as much with a stainless insulated liner..