र होटल आगोको ढोकाको लागि प्रयोग गरिएको सामग्री जलन र उच्च तापक्रमको लागि अत्यधिक प्रतिरोधी हुनुपर्छ, यसले विषाक्त ग्यासहरू मात्र छोड्दैन, तर विषाक्त ग्याँसहरूको प्रवेशलाई पनि रोक्न सक्छ।

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