Compu-Solar Heating Controller captures the free heat generated by the sun and transfers it into your pool water, at practically no cost. The unit monitors a 1 degree Celsius or greater temperature differential between pool water temperature and return water temperature from the solar collector.  If the differential falls below 1 degree Celsius, the controller will stop water flow to the solar collector via the booster pump.  After 1 hour, the controller will initiate a 2 minute test cycle and the process will continue until the differential is again greater than 1 degree Celsius.

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