Isifudumezi semibhobho sisetyenziselwa ukufudumeza umoya odlula kwimibhobho yomoya.Izifudumezi zombhobho ziyafumaneka kwisikwere, ezingqukuva, ezibhijelweyo, kunye nezinye iimilo ukuze zingene lula kwiintlobo ngeentlobo zeHVAC kunye nemibhobho yoshishino.