... solar water heater,hotel,school,factory floor heating system,swimming pool heating and so on.It's simple structure make ... -welding All-copper Sun-strip or ultrasonic welding,and higherstrenghten and standing higher pressure.4.Insulation:Reduced the heat- ... or location7.Aluminum frame with electrophoresis coating :Good appearance and high anti-corrosion8.Cover:solar glass,strong tempered glass ...