SpaceBus
Minister of Fire
How big is your house? Even with the sloping fire back, which could be notched or modified, I think an appropriately sized insert would fit. A wood stove is far more efficient than a fireplace and doesn't have to be massive to heat a house.
![[Hearth.com] Trying to replace old metal lined fireplace [Hearth.com] Trying to replace old metal lined fireplace](https://www.hearth.com/talk/data/attachments/266/266955-999c069200f2cf5c00081b05e17944df.jpg?hash=4nTZUhxLen)