Worldwide the non-plus ultra in fan construction\nPatented high-tech developed in Germany! With its own developed and patented (((Noiseblocker)))® technology, (((Noiseblocker)))® introduced a new era in fan construction in the year 2008.\nThe Multiframe S series made by (((Noiseblocker)))®, which is generally recognised as the reference standard, is the first fan with a vibration-free fan frame and incorporates numerous other improvements, so that it is superior to standard fans in almost all aspects.\nIn conjunction with the unique (((Noiseblocker)))® technology, our almost noise-free NB-NanoSLI® bearing and the NB-EKAPlus II drive, the NB-Multiframe® S series currently represents the best that German engineering expertise has to offer. Quality you can rely on!\n\n- A unique, multipart vibration-free chassis with integrated structure-borne sound absorbers and glass fibre-reinforced frame.\n- Extremely low start voltage!\n- Easy assembly.\n- NB-EKAPlus II wide-range drive with low impulse noise.\n- Verified technical data.\n\n- Reverse pole and overload protection, restart function, extremely failsafe, 6-year guarantee.\n- Almost noise-free bearings.\n- xtremely low-noise and long-life NB-NanoSLI® bearings.