... series of products: 15W/K,35W/K,60W/K,80W/K,90W/K,100W/K,120W/K,160W/K,180W/K, 190W/K 200W/K 220W/K,230W/K,250W/Kand so on ... .Working Principle Diagram Certification:Other Heat ExchangerHeat Exchanger Core: YXH-05-DH counterflow air to air Telecom or communication Cabinet use ...