JK jerin (JK58, JK55, JK56, BJK67, JK40, DJK50) Ma'adinai na gida fan injin (a takaice ya kira gida fan), an tsara shi bisa ga karfe, launi, zinariya, sinadarai, kayan gini, nukiliya masana'antu da sauran ma'adinai kamfanoni na gida iska bukatun, zane cikakken la'akari da iri-iri na gida iska aiki surface da ake buƙata da yawan iska, iska cylinder isar da nesa, yau da kullun amfani da iska cylinder bayani, iska juriya darajar, da kuma amfani da yanayin a cikin ma'adinai, don haka mafi dacewa da daban-daban bayani sassan rami hako cikin iska, hakar ma'adinai lokacin lantarki rake hanyar jigilar, ba tare da kasa ginshiƙin hakar ma'adinai sassa hanyar shiga hanyar iska da sauran gida iska da wasu taimakon iska, lokacin da yanayin ya ba da izini, kuma za a iya amfani Daga cikin JK40 jerin tashar fan da DJK50 jerin juyawa juyawa fan za a iya shigar kai tsaye a kan hanyar kasa allon, kuma za a iya dakatar da shi a kan hanyar taimako bangon ko a kan saman allon. JK jerin ofishin fan raba zuwa uku nau'ikan 1, daya mataki aiki kaufa JK-1No 2, biyu mataki aiki kaufa JK-2No 3, juyawa juyawa