Oddiy eshiklarning funktsiyalaridan tashqari, yong’inga qarshi eshiklar ham yong’inning oldini olish, tutunni ajratish, yong’inni o’chirish va evakuatsiyadan himoya qilishning maxsus funktsiyalariga ega. Yong’in eshigi faqat belgilangan yong’inga chidamlilik vaqtida yong’in yaxlitligi talablariga javob berishi mumkin va yong’in yaxlitlik darajalari mos ravishda 1.0 soat, 1.5 soat, 2.0 soat va 3.0 soat.

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