4-Inch CleanFlow HEPA Filter

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.

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.

No fittiment issues.

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.

Fast shipping awesome filter reusable !!

Great filter

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.

It took a lot of shaving down on the inside lip to get it to slip onto my ac infinity 4inch inline fan. The fit is airtight once you get it to slide in enough but it’s a lot of work if you use a razor blade like I did.