Heat pumps and air conditioners both work off of the refrigeration cycle. A heat pump is essentially an air conditioner that has a reversing valve to allow the refrigerant to flow the opposite way.

It’s indeed not neutral. It always takes work to move heat from a cold area to a hotter area, so there’s always energy (and therefore heat) being added every cycle. https://en.m.wikipedia.org/wiki/Heat_pump_and_refrigeration_cycle

Space Station 14? The fact you specified 14 instead of 13 gives me hope that it’s making good progress.