Looking at amazon, kn95s cost ~$1 per mask. Replacement filters for the mask I listed cost $18 for the pair. If the mask filters last > 18 times longer than the KN95, the mask is cheaper.
There are two types of filters. Gas filters inactivate harmful gasses with chemicals in the filters. They need to be changed often because the filter runs out of chemicals. Particulate filters remove particulates from the air. They need to be changed once the filter clogs up with particulates. If you’re not using it to filter smoke/dust/ect, they can last a long time. I’d change at least once every 6 months, but that’s $36 per year in mask costs, which is pretty small.
Looking at amazon, kn95s cost ~$1 per mask. Replacement filters for the mask I listed cost $18 for the pair. If the mask filters last > 18 times longer than the KN95, the mask is cheaper.
There are two types of filters. Gas filters inactivate harmful gasses with chemicals in the filters. They need to be changed often because the filter runs out of chemicals. Particulate filters remove particulates from the air. They need to be changed once the filter clogs up with particulates. If you’re not using it to filter smoke/dust/ect, they can last a long time. I’d change at least once every 6 months, but that’s $36 per year in mask costs, which is pretty small.
https://www.safetyandhealthmagazine.com/articles/print/19329-the-life-span-of-respirator-filters-and-cartridges
As someone who exclusively uses respirators, I’d say they’re actually reasonably comfortable once you get used to them.
I see. Upgrade price to 9⁄10 then