) for aerodynamic performance and BS848 Part 2 (1985) for acoustic performance. Coupled with the above fan diameters, the adjustable pitch Aerofoil im
ent - Aerodynamic Spinning Cowls Terminals Combivent - Designed to allow the vertical discharge of flue gases through a roof mounted unit. Windvent - ...ng on aerodynamic principles. Natural Lighting DuctLight - An efficient means of illuminating any area by means of conducting natural daylight through