The GL-235 can be used to automate and control our current PCS3 attic solar pool heating system. The GL-235 can be be purchased online through PayPal if desired. If you want pricing information on the Goldline GL-235 solar controller or for the SolarAttic PCS3 attic solar pool heater or to find out if a local dealer is available in your area, fill out this attic solar pool heater pricing request form.