For over 40 years, HeThe Numatic Henry Commercial Vacuum Cleaner is designed for professional cleaning and reliable performance. Offering a huge 9L capacity for long, uninterrupted cleaning sessions, TriTex filtration for improved air quality and a professional accessory kit to meet a variety of cleaning needs, this vacuum is much more than just a smiling face.nrys happy face has brought joy to cleaners all over the world. Strong, quiet and super reliable, Henry remains the barrel vac by which all others are judged.