Solar Thermal Systems FAQs

Keeping propylene glycol from freezing in my solar thermal system.

avwFm87mDz2011-02-23T15:37:27+00:00A: How do I prevent my glycol from freezing during those rare deep freeze nights? Q: Your glycol, although rated for very low temperatures may be un-pumpable at a temperature higher than you expect. This can cause you system to overheat when the sun comes out...

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

avwFm87mDz2011-02-14T22:55:06+00:00Question:Do I need to use glycol if I live in an area where I only have a few days of freezing per year?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...