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[–] 3 points 1 year ago

Yes they absolutely do.

I didn’t even know how much until I analyzed data from multiple particulate sensors! But yeah I switched from having my hepa filter off at night to running 24/7. And this is with an extremely good whole house filter.

ymmv I suspect homes with ERVs/HRVs wouldn’t be as affected since they’re introducing outside air regularly. I don’t have one and wish I did.

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