First off, let me just say—these filters are a steal. I was skeptical at first because they're not the 'name brand,' but after using them in my Holmes HAP9424, I’m convinced. The package includes 4 HEPA filters and *8* carbon boosters, which is insane for the price. My allergies haven’t acted up since I installed them, and my apartment smells like... well, nothing. And that’s a good thing!

Installation was a breeze—they slid right into my purifier like they were made for it (because they were). The carbon filters are a nice touch for tackling odors, though I did have to get creative with a tiny piece of tape to keep them snug against the HEPA layer. A velcro strip would’ve been ideal, but for the savings? I’ll take it.

Side note: My friend walked in and immediately said, 'Wow, your place smells so clean.' Cue me casually pointing to the air purifier like it’s my secret weapon. These filters trap dust like nobody’s business, and I don’t feel guilty replacing them frequently since they cost half of what the OEM ones do.

If you own a Holmes or Bionaire purifier, do yourself a favor and skip the overpriced replacements. These work just as well—if not better—and your wallet will thank you.