Fresh Air Ventilation Dampers (FAD) - Field Controls
Cessna 210 Fresh Air Vent Kit System W210-100
Amazon.com: QJKW Vents Adjustable Louver Air Vent Extract Valve Grille 75-200mm ABS Round Diffuser Ducting Ventilation Cover Indoor Fresh air System Rugged and Easy to Install (Color : Light Yellow) : Tools
3M Speedglas Fresh-Air III Supplied Air System with V-100 Vortex Air-Cooling Valve and 3M Speedglas Welding Helmet 9100 MP, 27-5702-10SW, with Hard Hat, SideWindows and Auto-Darkening Filter 9100V