Air conditioners (the things that can make a room colder, but not hotter), are indeed heat pumps, but in the US when we refer to a "heat pump" we mean the same technology, but with a reversing valve so that it can make rooms both colder and hotter.
Air conditioners (the things that can make a room colder, but not hotter), are indeed heat pumps, but in the US when we refer to a "heat pump" we mean the same technology, but with a reversing valve so that it can make rooms both colder and hotter.
Interesting. I’ve never seen one that couldn’t heat and cool before. Even crusty 30 year old window units can do both. Seems almost absurd to not utilise it both ways.