The Numatic MFQ-37-22 is a small – medium size ‘Q’ vac., 12L capacity, plus the HEPA micro filter module within the 2-speed steel ‘Q’ power head giving an exceptional 99.997% certified efficiency. Standard kit-A1. Micro filter machines are particularly suited to areas requiring very high levels of filtration, such as; computer rooms, hospital operating theatres & clinics, etc