Fans are designed to operate at full speed, and it is most important that they are not run at half speed if proper ventilation or air conditioning is to be maintained.
Ifens zenjelwe ukuba zisebenze ngesantya esiphezulu kwaye kubaluleke kakhulu ukuba zingasetyenziswa ngesantya esisiqingatha ukuba iventileyshini ekanye ulungiso-meya elufanelekileyo lufuneka lugciniwe.