The sterilAir AQD2158-1 largely corresponds to the AQD2136-1 model, although it boasts a performance-enhanced combination of electronic ballast and UVC tube capable of achieving higher disinfection efficiencies.

All safety functions of the system are monitored and controlled by FCU2000 electronic control unit. At the conventional default dose of 400 J/m², the maximum water flow rate is 4,000 litres/hr. The reactor housing is made of stainless steel (WN 1.4301) which is additionally pickled, passivated and glass-bead-radiated from the outside.