1,solar water heater collector , 2,solar water heater, 3,split solar water heater, 4, CE/ISO/QC and so on... Feather:1. Use general glass vacuum tube to gather energy and supply large amount of hot water. 2. Easy plug-in installation.3. Corrosion-resist Colored powder coating steel,4. Can supply hot water to large amount water need. Economical for hotel, school, hospital and swimming pool.5. This ...