That was just a vocabulary issue, sorry. I’m not a native speaker. I meant heating with gas vs. heat pump, obviously not cooking with a heat pump, that‘s absurd.
That had not occurred to me because the rest of your comment was so clear. "Boilers" and "furnaces" refer to heating, and "stoves" generally refer to cooking. Exception: "wood stoves" are generally used for heating (indoor cooking with wood isn't common any more).