The swimming season on the Costa del Sol if you want to enjoy a warm pool is, unfortunately, only 3 months long. You can extend this to all year swimming with a Calorex Pro-Pac pool heat pump. They have sound-proofed compressors, hot gas defrost and titanium heat exchangers. Also, as you can see on the photo, they can be installed in a pool pump room.
See more at http://acair.com/pool-heatingmamarbellacosta-del-sol/