Comment by cyberax

Of course. But their hot ends are nowhere near 220C. I don't think such heat pumps even exist right now except in labs.

Looks like some experimental pumps within this region have CoP around 30%: https://www.sciencedirect.com/science/article/abs/pii/S03605...

So you'll need a lot of additional energy to run the pumps. Which will require additional radiator area.