Swimming Pool has 6 Main systems to control: -Filtration (Sand Filters, Skimmers, Vacuum) -Temperature (Temp sensor, Heat exchanger, Boiler, Cooler) -Water Clarity (Ozone, Chlorine, Ph and other) -Lighting and color (Under water moods) -Jets and valve pump controls (Solenoids, Pumps) -Water level (Sensor, Valve, +) For Jacuzzi must add -Air jets For Sauna must add: -Boiler -Timer -Air Quality