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1) The tube structure is between all-glass evacuated tube and metal-glass evacuated tube with Heat pipes.2) Suitable for frigid zones because there is no water in the tube.
3) Designed for pressure system.
4) Heat pipe material: TP2 copper.
5) The heat collecting part is a vacuum glass tube that lowers heat loss.
6) Stable solar conversion throughout the day, with the round shaped tube allowing solar penetration from all angles.
