Question about a wood heater that is definitely older than 1993. 
Anyone know exactly how these things were used? It's an unvented heater in the Swedish royal palace, and most bedrooms have one.
I am guessing that maybe they were loaded with coals from the fireplaces or something? Still seems like a CO hazard.
There is no visible vent, either a pipe going out of the room, or a direct vent to the room itself (which I guess might have been an option in a drafty old castle).
![[Hearth.com] History question [Hearth.com] History question](https://www.hearth.com/talk/data/attachments/248/248219-075264b9e703278bd631237bf6763289.jpg?hash=1zIJ6f34CG)

Anyone know exactly how these things were used? It's an unvented heater in the Swedish royal palace, and most bedrooms have one.
I am guessing that maybe they were loaded with coals from the fireplaces or something? Still seems like a CO hazard.
There is no visible vent, either a pipe going out of the room, or a direct vent to the room itself (which I guess might have been an option in a drafty old castle).
![[Hearth.com] History question [Hearth.com] History question](https://www.hearth.com/talk/data/attachments/248/248219-075264b9e703278bd631237bf6763289.jpg?hash=1zIJ6f34CG)