If you have two competing hazards and you don’t want to carry two kinds of masks.If you have a specialized use for a gas mask (like you live nearby a manufacturing plant or a volcano or something).If you’re worried about being caught amid civil unrest.That being said, there are plenty of good reasons to buy a gas mask, including: General debris/smoke: if a nearby building has collapsed or caught on fire, an N95, or even a wet rag, is good protection as you flee the scene.Epidemics and pandemics: There’s a range of protection for these situations, depending on how the illness spreads from a simple N95 mask, to the addition of eye protection, to the addition of a Tyvek suit.Firefighters wear SCBAs, which deliver oxygen directly to them.Īt the same time, there are hazards that gas masks can protect you from, but which cheaper, thinner, or single-use respirators or plain masks will also protect you from. Serious fires/thick smoke: The same principle applies here, gas masks don’t supply oxygen.At some point, there would be no oxygen to breathe, and gas masks don’t supply oxygen. If you stood in your basement when mustard gas had been released, for example, the gas would start to sink below the oxygen and push it up. Most hazardous gas is either lighter or heavier than oxygen and will concentrate on the ground or disperse in the atmosphere.
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