Hi
I have a SCHMID 9kW stove as a room divider. However, it also has a relatively large amount of storage mass. Among other things, I had it built up to ceiling height.
We always fuel it with about ~3kg of wood.
Our couch is quite close, but we still have comfortable temperatures.
Does your picture above show your house?
: great fireplace!
Buy an ash vacuum cleaner. I can only recommend it :)