Unfortunately for the summer my office is waaaaaaay too hot and I've stopped masking there. I know this is not the most optimal thing.....but it's getting to be pointless to wear a KN95 when it's so hot all the time I'm always mooching with it/removing it every 5min when no one is around.
I do mask everywhere else though, because most other places have better air contioning.
In the fall when the weather is cooler I am definitely going to back to wearing it all the time.
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i think an important overlooked aspect of wearing respirators is to keep indoor temps comfortable enough to not discourage their use.....besides the filtering effect AC has, keeping the inside of a building (especially older buildings) at a reasonable temperature helps prevent illness as it doesn't discourage respirator use.