I-Exhaust fan isetshenziswa kabanzi Kwezolimo kanye nokungenisa umoya embonini nokupholisa.Isetshenziselwa ikakhulukazi ukufuywa kwezilwane, indlu yezinkukhu, ukuzalanisa imfuyo, indawo ebamba ukushisa, indawo yokusebenzela yasefekthri, izindwangu njll.