4-Inch CleanFlow HEPA Filter

using to remove spores from exhaust air in a mushroom growing chamber. Water washable if you let it dry completely beffore usee. rinse water was milky white with pleurotis spores. stated pore size is effective for most all mushroom spores.

bought for 3d printer enclosure, works great no detectable increase in pm 2.5 or pm1.0 from 3d prints. This combined with a carbon filter and inline fan, create a negitive pressure for the enclosure. There is no longer a smell when printing abs.FYI I heat my enclosure to 53c so this filter is inside and exposed to that temp for sometimes 15 hours none stop.

I purchased this as part of my mushroom growing hobby. I put this hepa filter on the outside of my tent so that only filtered air comes in. It was easy to install on my blower fan and after about 2 months has worked flawlessly. It's a little expensive, but so are all HEPA filters in my book. I'll purchase this again when the time comes.

No fittiment issues.

Great filter

Fast shipping awesome filter reusable !!

Went through 2 of them. Both high particle counts under 1 micron. Almost the same as ambient. Does not seem to actually be hepa rated. Not sufficient for a lab. Great for adding positive pressure, great form factor, but not clean. Used for growing mushrooms.

The inner diameter of this filter has a “slip-on” rubber lip that should grab on to your fan. This rubber lip was so stiff and un-flexible that even copious lubricant use didn’t do squat to help me out. I had to end up trimming part of the rubber away with a knife to get it to slip on- and even then it was tight as hell. The filter itself is great- installing it to the fan it should fit on to is not so great.