RDZ's RNW 204 dehumidifier is used to control the level of internal relative humidity in floor / ceiling / wall cooling systems with radiant panels. It consists of a complete refrigeration unit, equipped with pre- and post-treatment coils, which are fed with cold water from the radiant panels. The unit is available in two different versions:
 The RNW 204 I dehumidifier must be embedded in its own frame inside the wall. The frame is provided with holes for hydraulic and wiring connections. The front cover is made of matt white lacquered MDF. The air passes through a grid, made of anodized aluminum.
 - The RNW 204 E dehumidifier must be mounted on the wall, with a matte white lacquered MDF frame.