Isigaba se-insulation sisho ikhono le-insulation material ukumelana nokushisa, okubalulekile emisebenzini ehlukahlukene, kusukela kumasistimu kagesi kuya ekwakhiweni kwesakhiwo. Futhi ingenye yemingcele eyinhloko ye motor kagesi. Ukuhlukaniswa kwamakilasi okufakelwa kubalulekile ukuze kuqinisekiswe ukuthi okokusebenza kungamelana nebanga elithile lokushisa ngaphandle kokululaza noma ukulahlekelwa ukusebenza kahle kwakho. Amakilasi okuvikela ukushisa ngokuvamile ahlukaniswe ngezigaba eziningana: A, E, B, F, H, Y, no-C, ngalinye limelela izinga elihlukile lokumelana nezinga lokushisa.
Emishinini kagesi njengamajeneretha,izingxenye ezintathu ze-induction ac motorsfuthi olunye uchungechunge lwe izinjini zikagesi, izinto zokufakelwa zimelela ubungozi obukhulu. Lezi zinto zithinteka ikakhulukazi ekushiseni okuphezulu, okusheshisa ukuguga nokulimala kwazo. Izinto zokufaka ezihlukene zinezindawo ezihlukene zokumelana nokushisa, kanti izinto zikagesi ezisebenzisa izinto zokufaka ezihlukene zinamandla ahlukene okubekezelela izinga lokushisa. Ngakho-ke, imishini kagesi evamile inomkhawulo ophezulu wokushisa wokusebenza.
Ukuhlukaniswa kuqala nge-Class A, elifanele izinhlelo zokusebenza eziphansi zokushisa, kanye ne-Class C ezindaweni eziphakeme kakhulu zokushisa. Ikilasi ngalinye lihlobene eduze nokumelana nezinga lokushisa lokufakelwa, okusho ukuthi uma isigaba siphezulu, sikhulu ikhono lezinto ezibonakalayo lokumelana nokushisa okudlulele ngaphandle kokonakalisa ubuqotho baso besakhiwo. Isibonelo, ukwahlukanisa kwe-Class B kungamelana namazinga okushisa afika ku-130°C, kuyilapho i-Class H ingakwazi ukumelana nezinga lokushisa elingaphezu kuka-180°C.
Izinto zokushisisa zingahlukaniswa ngobubanzi zibe izigaba ezintathu: igesi, uketshezi, nokuqinile. Ukufakwa kwegesi ngokuvamile kuhilela ukusetshenziswa komoya noma amanye amagesi ukuze kunikeze ukumelana nokushisa futhi kuvame ukusetshenziswa ezinhlelweni ezifana namafasitela acwebezeliswe kabili. Ukufakwa kwe-liquid, ngakolunye uhlangothi, kufaka phakathi izinto ezinjengamafutha noma ama-gel agcwalisa isikhala futhi anikeze umgoqo oshisayo. Ukwahlukanisa okuqinile kuhlanganisa izinhlobonhlobo zezinto, okuhlanganisa igwebu, ingilazi ye-fiberglass, nerabha, evame ukusetshenziswa ezindaweni zezimboni nezindawo zokuhlala.
Ukuqonda ukuhlukaniswa kwamabanga okufakwa kwe-thermal kubalulekile konjiniyela, abaklami bezakhiwo, nabakhi ngoba kuthinta ngqo ukusebenza kahle nokuphepha kokuphathwa kokushisa ezinhlelweni ezihlukahlukene. Ukukhetha izinga elifanele lokufakwa kwe-thermal kuqinisekisa ukuthi okokusebenza kusebenza kahle kakhulu ngaphansi kwezimo ezithile, ekugcineni kuzuze ukonga amandla nokuqina okuthuthukisiwe. Njengoba ubuchwepheshe buthuthuka, ukuthuthukiswa kwezinto ezintsha zokufakwa kwe-thermal kuyaqhubeka, kuthembisa ukusebenza okungcono kakhulu nokuzinza esikhathini esizayo.