solar water heater: 1. pressurized solar water heater 2. free standing 3. warranty for 5 year 4. CCC,CE,Solar Keymark Application ... ) aluminum fins welded with copper pipes which is cheap solution.3) double aluminum fins hold copper pipes which is cheap solution ... , Area A 2CANTON FAIRApril 15-19, 2010Guangzhou 3K/BISMay 1-3, 2010Atlanta 4INTERSOLARJune 9-11, 2010Munich 5CANTON FAIROctober 15-19, 2010 ...