3MPowerflow High Efficiency SP3 Particulate Filter System Component 450-01-01R20

These filters do a great job of filtering the air in moldy places. We use them consistently in our mitigation business. 3 M is a brand you can trust and rely on for performance.

nice having

Kept me alive through COVID working in an ICU with the Powerflow PAPR

Yes used it to remove asbestos and moldy Sheetrock from a house built in the 50's.

Just what I needed for my par.

To be clear - this is for a pack of filters, not the mask and battery kit.The filters have a very long life.Unless you are in a severe environment or an industrial user, it would take a very long time to go through this many filters.I'm using it for personal purposes for home use. It is a general purpose hepa filter great for sawdust from woodworking or sanding, and I even use it for mowing the grass because I have bad allergies, this works so much better than a cloth mask or half face respirator as it filters the air you breathe but also protects your eyes and helps keep you a bit cooler.I've had my PAPR for about 8 years, I'd estimate I use it maybe 4 hours a week doing yardwork and diy projects. I'm only on my 3rd filter.While it isn't recommended by 3m, you can usually turn them upside down (from the air inlet end) and bang out any loose dust and particulates, or gently blow it out in reverse (from the outlet end) to clean it out and get some extra life out of it.