A cikin takamaiman yanayi, Gas masu ƙonewa na iya fuskantar konewa mai tsanani, sakin babban zafi da haifar da saurin faɗaɗawa cikin ƙarar iskar gas da ke kewaye, haifar da fashewa.
Carbon monoxide yana da kewayon fashewa 12.5% ku 74%. Don ƙirƙirar yanayi mai haɗaɗɗiyar konewa, it needs to be uniformly distributed within 12.5% ku 74% of air.