This consists essentially of two main axial-flow fans, one supply and one exhaust, together with ducting systems arranged to distribute air within, or exhaust air from, a section of the ship.
Oku kuquka isiseko sawona mabini e-asi zefeni equkuqelayo,omnye angathumela kwaye omnye uyadabalala kunye nezixokelelwano ezicwangciselwe ukusasaza umoya phakathi okanye udabalalise umoya ukusuka kwicandelo lenqanawa.