Advantage: 1.Simple Installation,No Maintenance,Effective operation. 2.Anti-freeze. Specification: 1.Flowing passage:1.2 mm copper 2.Accessories:plastic bottom support,silicic gasket 3.Outer chest: 2.0mm Aluminum alloy 4.Quality Certificate: EN12975, ISO9001:2000, CE 5.Bracket:1.8mm Aluminum alloy 6.Warranty:5 years for full system 7. insulation layer: 50mm Rock Wool 8. Working Temp.:99 Celsius degree 9. Working Press.: 1.0Mpa (10 bars)