The overall cost of the solar-powered heat pump system was valued at JOD360,920. The hotel has a family pool, with a 310m 2 surface; the main pool, with a 515m 2 surface; and a spa pool with a ...

For those cool summer days it’s sometimes nice to have a heated pool — but usually pretty expensive too. Looking for a simpler solution [Martin] came up with his own solar pool heater for ...