Ifasitela elingenamoya elinomfutho ohlangothini lwe-CIVO lihlanganisa izinzuzo zamafasitela ashelelayo namafasitela e-casement, okungagcini nje ngokuthatha isikhala kodwa futhi okunomphumela ofanayo wokuvala njengefasitela le-casement, okuxazulula ngokuphelele inkinga yokuvala ifasitela ebhalkhoni elincane.