The sterilAir UVR2250-4 disinfection unit is a higher-efficiency version of the UVR2250-1. Following the same functional principle and based on the same housing (opened in the illustration on the right for demonstration purposes), the UVR2250-4 accommodates a total of four UV tubes with a total UVC radiation energy of 92W254nm.

With an increased air output of around 450m³/hr, the germ-reducing capability of the system is markedly higher than that of the UVR2250-1, making the unit ideal for the disinfection of heavily contaminated or high-volume rooms/halls.