The decentralized underfloor ventilation units in the FSL-U-ZUM series are used for fan-assisted ventilation of rooms and buildings. They are equipped with filters for supply and recirculated air and have a heating/cooling function. An automatic volume flow restrictor limits the outside air volume flow to the minimum air exchange rate. For greater heating/cooling requirements, the supply air volume flow is boosted by an admixture of recirculated air. The units are available as a complete solution with FSL-CONTROL control system. Further information you find in: Product description