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1.Material &Thickness of Frame: Aluminium Alloy & 2.75mm
2.Material of insulation: polyurethane foam & aluminium silicate
3.Thickness of insulation: 35mm (polyurethane foam)
4.Header pipe thickness: 1 mm
5.pipeline material: SUS 304-2B / 0.4mm thickness
6.Three-highs vacuum tubes
7. No. of vacuum tube: 15---30 for one collector
8. Single-winged and double-winged collectors are both available
9. Hailstone resistance: 25mm
Non-pressurized Solar Collector