Pretty much. They still mine, and use expelled heat to warm-up the room.

Processors use transistors. Transistors use electrical charge to turn on/off the gate. When it is used, it is charged/discharged. There is always some resistance that will be there, and that will always translate into heat. Usually the hotter the conductor gets, the more resistance it has. So taking that heat away and into the air, heats up your room. I can’t tell how good or bad these miners are, but probably not the best! 🐶🐾🫡