Why is an evacuated tube a better collector than a flat plate?
There are various reasons : • Higher yearly efficiency due to the superior insulation provided by the vacuum. This makes vacuum tube collectors much better for space heating applications as well as all year DHW. • Easier Installation & Servicing. Tubes are installed/removed individually without special tools. You don’t have to shut the system down if a tube is removed due to the dry connection to the heat exchange manifold (no leakage potential). • Longer Life. Absorber surfaces are protected from environmental degradation by the hermetically sealed glass tube. • Tubes Rotate.
