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I was thinking of using a mask to cover my nose so that smell / smoke will not get into my nose while I am doing some repair work.

Beside using mask, are there better alternative such that I can still breathe normally? (The mask do make breathing quite difficult sometime. The worse case is using a oxygen tank but it seems to be a "over-kill" solution.)

Would appreciate if picture / illustration can be included.

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What type of smoke? – gregmac Jan 16 '12 at 4:12
What kind or repairs are you doing? – shirlock homes Jan 16 '12 at 11:23
@shirlockhomes Actually some manual repair on my bike. Sometime can smell something. (Sometime, there is some white smoke - but it is the smell that I want to block). – Jack Jan 27 '12 at 7:15
up vote 1 down vote accepted

In your case a fully isolating mask connected to some source of fresh air is the best solution. Perhaps you could get without a tank and just have two pipes that end somewhere where there's no substance you protect from - not sure if it works, but worth considering.

The problem with the mask is it has pretty limited blocking capacity - if the substance has high concentration the mask filter will get saturated pretty soon and the mask will get ineffective. Add to this that it complicates breath and it's clear that the mask is not always the best option.

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