I'm in the process of replacing the house's 40-year-old pellet boiler with geothermal heating and now want to double the area in the laundry room and remove the older fire-protected boiler room.
My educated guess is that the wall in question is made of lightweight concrete and does not seem to be anchored more than mortar and plaster, as it's possible to hammer out quite substantial holes with a regular hammer and screwdriver (professional assessment ^^).
The rest of the house has concrete walls, a cast foundation, about 35cm concrete + reinforcement between the basement + first floor.
The wall in the basement to be removed is marked with a red arrow, the drawing is not quite accurate as the wall/door continues down to the wall towards the hobby room. The corridor between laundry/hobby room does not exist.
Upper floor:
