- perfect choice for utilizing heat from wood chips, biogas plants or CHPPs. - A major advantage of the heat exchanger in comparison to conventional gas-operated heating systems is the residue-free product of heat, i.e. there are no combustion by-products such as CO2 and water vapor. - Available in different versions “vertical”, “horizontal” as well as “sucking” (for high throwing ranges) and “pressing” (for low speeds).