Fumana ukuba kukho iipaddles ezine ezantsi kwesipheki segesi, zimbini ngasekhohlo kwaye ezimbini ngasekunene.Ungahlengahlengisa ukuba leliphi icala lelangatye lerhasi elingaqhelekanga.
1. Guqula ivalve yokupheka ibe yeyona iphezulu.Ngeli xesha, ukuba iicones zangaphakathi nangaphandle zedangatye azicacanga, okanye zityheli, oko kuthetha ukuba umthamo womoya awanele.Lungisa i-damper ukwandisa umoya wokuqala othathayo de iicones zangaphakathi nangaphandle zedangatye zicace kwaye zijike ukukhanya okwesibhakabhaka.
2.Yehlisa ivalve yompheki.I-damper ayilungiswanga umlilo omncinci.Ukuba ilangatye liba lifutshane, oko kuthetha ukuba umthamo womoya mkhulu kakhulu.Yehlisa ivalve kancinci.