What is a Pressurised Solar Thermal system?
A pressurised solar thermal system is a very efficient type of solar thermal system. They are designed in a similar way to a pressurised central heating system with an expansion vessel, pressure relief valve and pressure gauge. The liquid inside the solar system can operate safely at temperatures in excess of 100*C without boiling or vaporising because the liquid is under pressure so the boiling point is raised. Pressurised solar thermal systems should always be filled with a solar grade antifreeze and because of this will still work at -28*C. Our pressurised solar thermal systems collect the most energy.
