... The angle can be fixed, or adjustable. Heat pipe solar collector can start work very fast. The heat transmission ... in the building, such as appartments, hotel, hospital, swimming pool, and plant. 3.Specifications: 1Outer Manifold MaterialAluminum Alloy2Header Pipe ... 4. Good quality 5. Adequately use non-pollution and clean solar energy 6. Automatic controller, reliable operation, onetime investment, ...