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Solar water heater en**6 Solar thermal collector solar water heater, non-pressurized solar water heater, pressurized solar water heater, non pressurized solar water, heater vacuum tube solar water heater, vacuum tube solar water heater, solar heater, green energy technology, China solar, solar system Advantages: 1)Choose applicable non-pressure manifolds according to different demands. 2)From family to factory; from tens to hundreds to thousands, It is widely used in solar central heating project, such as swimming pool, hotels, schools, armies and factories. 3)Automatic supplying water, electric heat, recycling and protection. 4) Investment only once, benefit forever. 5) No harm, No pollution, saving and clean. Detailed Product Description 1) Water tank (interior): stainless steel 2) Water tank (exterior):Color Armor/Aluminum alloy 3) Glass tube dimensions: *8mm x 1.8m / *7mm x 1.5m 4) Heat preservation: *2h 5) Hail resistance: *5mm 6) lifetime:*5 years ESN –Technical Date Model Name Tube Specification Tube Coating Daylighting Area Capacity Pressure Person ESN****7/**0 Φ*7mm****0mm**5 AL-N-AL 1.3m2 ******0L 0.5Bar 1～3 ESN****7/**0 Φ*7mm****0mm**0 AL-N-AL 3.0 m2 ******0L 0.5Bar 1～3 ESN****8/**0 Φ*8mm****0mm**5 AL-N-AL 2.3 m2 ******0L 0.5Bar 2～5 ESN****8/**0 Φ*8mm****0mm**0 AL-N-AL 5.0 m2 ******0L 0.5Bar 2～5