Mpweya wosinthasintha uwu uli ndi ma diameter awiri, 160mm ndi 250mm, onse ndi 10m kutalika ndipo amatha kulongedza m'thumba kuti asungidwe mosavuta.Ducting imatembenuza mosavuta Bersi air scrubber B1000 ndi B2000 (yogulitsidwa padera) kukhala Negative Air Machine yokhala ndi ma ducting osavuta, osinthika.