Nilfisk CV20 Central Vacuum UnitExperience European quality in a central vacuum system. More Power Quieter operation True HEPA filtration Nilfisk central vacuums line combines Swedish style and quality with power, durability, low operating noise and HEPA filtration. These central vacuums use a powerful, long life AMETEK motor which is mounted in a patented noise reducing housing. The state of the art motor controller uses a triac electronic switch and slow start design to help