The world's ultimate in fan construction Patented high tech developed in Germany! ((((Noiseblocker)))® ushered in a new era in fan construction in 2008 with the self-developed and patented NB-Multiframe® technology. The Multiframe S series from (((Noiseblocker)))®, which is generally recognized as a reference, is the first fan with a vibration-free fan frame and has numerous improvements and is superior to standard fans in almost all areas. In combination with the unique NB-Multiframe® technology, our almost silent NB-nanoSLI® bearings and the NB-EkaPlus II drive, the NB-Multiframe S series is currently the best that German engineering has to offer. Quality you can rely on! Unique multi-part vibration-free chassis with integrated structure-borne silencers and fiberglass reinforced frame. Extremely low starting voltage! Easy to assemble Low pulse noise NB-EKAplus II wide range drive. Verified technical data. false pole and