water exchanger unit AXHE-heating capacity:6.5kw,8.5kw,12kw, 18kw, 21kw, 25kw, heat exchanger titanium in PVC 5/ ... /8INCH 3/8inch,1/2inch,7/8inchwater connection 50mmmain unit need dimensions: 400/335/530mmAxen is specialized in manufacturing ... heat exchanger but also supply the products like coaxial heat exchanger, shell and tube heat exchanger, etc. High efficient air to water heat exchanger unit ...