I used to wear masks similar to surgigal ones and even if they where rated NIOSH N95 I was not satisfied with them.
Despite they had a metal brace to tight them over the nose, my breath was fogging my glasses. In addition, I was re-breathing my own exausted breath. I upgraded to the same type of mask but with a respiratory valve. It lessen the re-breathing but did not stop it completely. My glasses where still fogging.
Fogging my glasses mean bad seal aroung the face so if breath exit through the sides, dust comes in from the sides- As simple as that. Dust particles as small a 1 micron are bad for the lung and lead to permamnent dust-related health issues (1 micron is about millionth of a yard). Those small masks are not good because you are still breathing airbonrne invisible dust. A hair size is 100 micons, visible dust under a sun ray next to a window is 10 micon. NIOSH N95 standard is 1/3 of a micron. This is very effective filtering but only if you have a mask that provides a good seal on the skin.
THE FOLLOWING FIXED MY PROBLEMS
I bought a AOsafety mask and all the above problems are gone (fogging glasses, bad filtering and re-breathing my own exausted breath). This mask is available in different brand names so I included a link fo you guy to see it.
I paid 20$ CAN. At Canadiadian Tire. Lee Valley sell it 35$ CAN. under a different name. The air intake is about 3 inches dia. and the 2 exhausts vales on the side are about 1 inch each. The air comes in from the filter (a intake vale in hidden behind the filter) and is exhausted on the side by the vales. The filter is replaceable and cost about 5$ for a set of 4.
Despite they had a metal brace to tight them over the nose, my breath was fogging my glasses. In addition, I was re-breathing my own exausted breath. I upgraded to the same type of mask but with a respiratory valve. It lessen the re-breathing but did not stop it completely. My glasses where still fogging.
Fogging my glasses mean bad seal aroung the face so if breath exit through the sides, dust comes in from the sides- As simple as that. Dust particles as small a 1 micron are bad for the lung and lead to permamnent dust-related health issues (1 micron is about millionth of a yard). Those small masks are not good because you are still breathing airbonrne invisible dust. A hair size is 100 micons, visible dust under a sun ray next to a window is 10 micon. NIOSH N95 standard is 1/3 of a micron. This is very effective filtering but only if you have a mask that provides a good seal on the skin.
THE FOLLOWING FIXED MY PROBLEMS
I bought a AOsafety mask and all the above problems are gone (fogging glasses, bad filtering and re-breathing my own exausted breath). This mask is available in different brand names so I included a link fo you guy to see it.
I paid 20$ CAN. At Canadiadian Tire. Lee Valley sell it 35$ CAN. under a different name. The air intake is about 3 inches dia. and the 2 exhausts vales on the side are about 1 inch each. The air comes in from the filter (a intake vale in hidden behind the filter) and is exhausted on the side by the vales. The filter is replaceable and cost about 5$ for a set of 4.
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