Caoduro manufactures zenithal daylighting, natural ventilation and smoke and heat control systems at Monticello Conte Otto near Vicenza, including the Smoke Out range of natural smoke and heat exhaust ventilators and the PSO series of powered units. The Smoke Out range is published as conforming to Regulation 305/2011 and CE marked, and as tested and certified to UNI EN 12101-2 by an accredited body. The firm’s certifications page sets out the work it does against UNI 9494-1 for the design and installation of natural systems, UNI 9494-2 for powered systems and UNI 9494-3 for initial checks and maintenance, and it co-authors the ZENITAL technical guidance on EN 12101-2 CE marking. The accredited body is referred to generically and is not named.