Features: 1) High efficiency solar collector using heat pipe evacuated tubes 2) Able to be used in all climates 3) Reliable and efficient with twin-glass solar tubes 4) Copper heat pipes for rapid heat transfer 5) Easy plug-in installation for mounting on the roof or at ground level 6) Maintenance free 7) Suitable for mains pressure water (up to 8bar / 116psi) 8) Corrosion resistant silver brazed copper header