... EPDMHT, Neoprene, Teflon, Viton I, Viton F Air to Air Heat ExchangerKey Description: 1, The machine takes into ... the exhaust air and fresh air and makes total heat exchange between each ... -treating the fresh air by energy of the exhaust air can enable the fresh air to lower temperature and ... pd alloy For more detail info, please feel free to visit our website or inquire us at any ...