Strange article. It seems to imply that air-conditioners and heat-pumps are two different animals. But all air-conditioners are just heat-pumps. They just work

Strange article. It seems to imply that air-conditioners and heat-pumps are two different animals. But all air-conditioners are just heat-pumps. They just work one-way only. For a few extra bucks, the so-called 'heat-pump' merely has the capability to direct the hot and cold air-flows in the opposite direction. (In other words, if you took that window-installed air-conditioner and reinstalled it to face the other way in autumn, it would blow the cold air outside in Winter and the hot-air inside.)