Mouseclick the different parts of heat pump (compressor, condenser, evaporator etc.) to reveal the explanation of that specific part.
If you don't see a small animation already, check your browser settings. Your browser must support flash.
Click on the image to start the animation in a bigger screen.
Disclaimer: Since flash is near end of life and browser support is strongly diminished, Horos gives you the possibility to download the standalone flash version of the animation. Download link is based upon operating system.