I-Fibglass ama-duct angasetshenziselwa ukuletha igesi ngaphansi kwemvelo yegesi yokugqwala. Ipayipi elinjalo lingaba yindilinga noma libe ngunxande, futhi lingamelana negesi ewonakalisayo, enjenge-chlorine gesi, i-flue gesi, njll.
Ubukhulu: Ngokwezifiso
Imodeli: Ukujikeleza, unxande, ukwakheka okukhethekile, okwenziwe ngezifiso, njll.