[veemjeem]

Sadly most popular window a/c units don't have true heat pump abilities. Usually the heating portion of window units use resistive heating.

[Siecje]

Air Conditioners are heat pumps, a water pump moves water and a heat pump moves heat.

[lsaferite]

While technically correct that an AC _is_ a Heat Pump, the current commonly understood meaning of Heat Pump is a Bi-Directional Heat Pump while an AC is a Uni-directional Heat Pump (moving heat outside).

[Siecje]

Only if you work in the industry and located in a specific region.