Excalibre Technologies are the proud UK partners of market-leading, Proventia Oy. The Proventia NOxBUSTER® City is a retrofit solution for ULEZ and CAZ, which enables Euro 3, 4 or 5 buses and trucks to meet Euro 6 standards.
Proventia are based in in Oulu Finland and are a leading developer and manufacturer of retrofit and OE emission control systems. The systems have full TfL and CVRAS approval ensuring compliance with the Ultra low emission zone (ULEZ) and Clean Air Zones across the UK. Over 1,000 systems have been installed across all major London bus operator.