The new, aerodynamically optimized impeller is reducing the sound level to half, compared with conventionally designed impellers. The new impeller avoids turbulences in the duct, which leads to higher efficiency and extremely low sound emission.
The impellers are manufactured in one piece, means without any joints, which allows for a high peripheric speed and thus a high performance. The casing material (PA6 with fibre glass)as well helps to reduce the sound levels. The impellers have a high corrosion resistance.
The casing of the new circular duct fan series RVK sileo is manufactured from very robust polypropylene with a 30% fibre glass content.
The ErP requirements are mostly surpassed with the new RVK sileo generation of circular duct fans. Up to size 250L we already today cover the requirements of 2015. All sizes cover the requirements of ErP 2013.