Do I need to use glycol if I live in an area where I only have a few days of freezing per year?

Question:

Answer:
If you live in an area that doesn’t get below freezing often (less than 5 days per year) it is possible to get away with using water instead of glycol. In order to make sure that the water doesn’t freeze you need to have your controller (ie. SmartMaxx DHW-Plus) run with freeze protection. The freeze protection setting monitors the collector temp and when it goes below a specified temp (40 F) the pump will kick on the circulate the fluid which will prevent the water from freezing.