I am renovating my house and have a small office on the lower floor that I want to remove (the idea is to have two more substantial rooms on that floor). But I'm unsure if the walls could be load-bearing in any way? I assume the green-marked wall on the drawing (see image 1) is the one that matters and is probably a "hjärtevägg"? It's the two red-marked ones in the black grid that I want to take down - can you see from the drawing if it's okay? (There is also a beam crossing the ceiling in the large living room next door, if that matters...) I also attach a side view image where I've marked the previously green wall that I assume is "hjärtevägg". Grateful for all help!
The green-circled wall, which is replaced by a beam, is a heart wall. A heart wall is load-bearing; if you remove such a wall, it must be replaced with a beam that can handle all the weight from above.
Your two red-marked walls should not be load-bearing.
What material are the walls made of?
How thick are the walls?
The walls of an adjacent room are built with wooden boards approximately 2 cm thick (and it was the same in another room where the walls were demolished, so I'm guessing that's the case).