Tsarin iska mai zubar yana zuwa ingantaccen matsin iska, mara kyau haushi, daidai matsin lamba (ko samun kyakkyawan matsin iska) yanayin iska, da kuma samun iska. Kyakkyawan iska mai ƙarfi da kuma matsin lamba (ko micro-tabbatacce) da keɓaɓɓen tsarin gini na al'ada, akwai wannan takarda ta al'ada.
Game da rashin tacewa mara kyau, bisa ga hanyoyi daban-daban na cizon iska, amma kuma ka raba zuwa yanayin rufin iska, kuma rufin iska a cikin yanayin haɗin gwiwa. Matsakaicin matsakaicin zafin rana na yankin na arewaci a China ba ya wuce sama da digiri 30, na iya ɗaukar rufin saman rufin iska; Sauran babban zafin jiki na zafi na bazara ya dauki hadewar rufin da kuma labulen bakin ciki.
