Solar thermal collectors
Product of the month: Solar water heater with overheating protection
...collectors can reach temperatures as high as 200°C (395°F), and evacuated-tube collectors can reach temperatures as high as 295°C (563°F). It is important to be aware that solar glycol will begin to break down when temperatures exceed 150-200°C for long periods of time. Glycol will then turn acidic and cause particulat...