The THOR plenum boxes are recommended accessories for distribution elements such as diffusers, nozzles, etc. and are used for air inlet and outlet. The THOR plenum boxes with diffusers adjust pressure drops, reduce noise level, balance ventilation systems and measure airflow volume. The THOR plenum boxes are made of galvanized sheet steel. On the inside they are equipped with noise insulation. The THOR-E version is supplied without insulation.

The CFC-A clean plenum boxes with cassette hepa filter are primarily designed for air supply, but can also be used for exhaust air, with high demands for efficient filtration. The clean plenum boxes are primarily designed for hospital environments such as operating theatres, intensive care units, pharmaceutical laboratories or clean industrial manufacturing plants. The high-capacity filter cassette in an aluminium frame with a protective net is designed to capture all dust and biological particles in the appropriate filtration class to ensure the desired quality of the filtered air. The clean plenum boxes can be fitted with high efficiency filters from E11 to U18.

The CFC-A clean plenum boxes are available with a flat or gel seal of the filter cassette, with horizontal or vertical connection, in the version without damper or with an airtight damper that is operated directly from the room space in the horizontal version, in the vertical connection it is operated from the ceiling space. As accessories, 5 types of front grilles are supplied, perfectly imitating the already set standards of HVAC applications.