with copper tube heat exchangerpressure in the water tank, avoid polution in the water can use two kind tube: DAC-E style: Al-N-Al tube, tube length 190cmDAC-EH style: Heat tube, tube length 180cmwater tank volumn: 210L, 240L, 300L, 360L DAC-E and DAC-EH solar heater
Supplier:
Fancyco [China Manufacturers]