ExcelAir engineers, supplies, commissions and maintains car-park ventilation, RWA and stairwell overpressure systems, and supports owners through CCV inspection certification. The company holds BSI Certificate of Constancy of Performance 2797 CPR 620853 for EN 12101-3:2015, powered smoke and heat exhaust ventilators, assessed under System 1 and issued by BSI as notified body 2797. It publishes that certificate alongside CFD analysis, PvE drafting and NEN 6098 guidance for its parking-garage projects.