Kelvion Holding GmbH (Kelvion Holding), formerly HX Holding GmbH, is a provider of heat exchangers. ​

It manufactures and distributes heat exchangers and air conditioning systems. It offers products such as finned tube heat exchangers, modular cooling towers, plate heat exchangers, shell and tube heat exchangers, wet cooling towers, single tube heat exchangers and others. Kelvion Holding provides product development, installation, and after-sales services. ​

The company serves chemicals, oil and gas, marine, power, food and beverages, heavy industry, HVAC and refrigeration, transportation, and other sectors.